YMMV / Kantai Collection

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    Tropes Present in the Browser Game 

  • Adaptation Displacement: Initially, although not anymore. The franchise (especially Shimakaze) spawned so many doujinshi and other derivative works that people were surprised to find out that it's a browser game.
  • Americans Hate Tingle:
    • As with any Japanese media franchise focusing on World War II, many Koreans do not like Kantai Collection. In particular, there was editorial written in the South Korean newspaper, Hankook Ilbo, criticizing Kantai Collection for the conservative political shift among young people in Japan following the long-term economic recession and political instability and glorify Imperial Japan's militarism. Japan Times wrote a counter response to such criticism stating that Space Battleship Yamato had faced similar criticism when it first aired, but had little impact in Japan's domestic politics. note 
    • It is also not well-liked in certain parts of the United States (particularly Hawaii) nor among many Allied veterans or their family members, since nearly all the protagonists are personified Japanese warships from World War II. The antagonists are demonic in nature and, though not outright said to be the American military, were strongly implied to be until recent events.
      • This theory has since been challenged (and possibly even debunked) by the reveal of American 16-inch gun turrets accompanied by a Fairy, along with the debut of Iowa, the first USN ship girl, in both the PlayStation Vita version, and later on in the original browser version.
  • Audience-Alienating Premise: The fact that the protagonists are on the side of Imperial Japan has made some of the more historically-minded western gamers uncomfortable, given the war crimes the Japanese committed in WWII.
  • Author's Saving Throw: When the land-based bombers debuted in the Spring 2016 event, they did rather low damage. Kadokawa issued a patch to correct this, and now they do absolutely insane damage, sometimes going upward of 1000.
  • Base-Breaking Character: The release of the canon design for Iowa caused a split between those fans who prefer the Pacific: World War II U.S. Navy Shipgirls design, those who prefer the canonical one, those who don't mind either, and those who dislike both.
  • Breather Level:
    • The Arpeggio event in Winter 2013-14, being a newbie-friendly event, was this compared to the events sandwiching it (the infamously nightmarish Fall 2013 event and the Anniversary Spring 2014 event). It was the first event which consisted of only three maps, no boss health regeneration (all other events had this feature after the first two maps) and it contained only the second map in the history of the game with a 100% chance to reach the boss regardless of fleet (the May 2013 E-4 map being the first, but it was also a lot harder to clear).
    • The Fall 2014 event, which consists of again three main maps plus an "extra operations" map. Much like the Arpeggio event, this came in the wake of the Fake Difficulty-filled Summer 2014 event, and is much easier by comparison, again allowing for chip damage and no Boss HP regeneration.
    • The Spring 2015 event was also this. When it was announced as a "large scale event", players (especially veterans) expected an event on the difficulty tier of Summer 2014, which was one of the most difficult events in the game's history. What they got instead was an event so easy some considered it to be easier than Autumn 2014. Then again, it had 6 maps, so the developers weren't wrong…
    • Map 5-4, also known as the Tokyo Express Map, has a branching route that allows the players to clear the map with ease, much to the relief of players who had suffered from the map immediately before it.
    • Summer 2015's E-5 was surprisingly easy for a map that had Armored Carrier Princess leading a sub-node and Battleship Princess being the boss.
  • Broken Base:
    • There's a minority of Western fans, especially in the United States, that find the ability to marry Destroyers and other ship-girls that look to be little more than children to be extremely discomforting. Equally minor and equally vocal is the exact opposite side of this. Unfortunately, this even extends to people who have never played the game or know anything about it calling everyone that does like the game a Lolicon.
    • The January 29, 2014, update turned into this for non-Japanese players, as it made the game progressively harder to play continuously by introducing a periodic reset for the game's API link. Half of the foreign players declared it the end of the world and abandoned ship, while the other half just took it as something to get used to and a minor inconvenience at best (as grabbing a new API link every 90 minutes takes less than five minutes). However, with the periodic need to get a new API forcing countless players to log in simultaneously, the DMM log-in servers got overloaded, making the game inaccessible to almost everyone for hours at a time. The API reset was subsequently quietly removed in the emergency update that followed, much to the relief of many...then the system with some tweak note  is reinstated again in October 9, 2015 update, though the cookie method of playing has been discovered by then so it's less problematic for non-Japanese players.
    • Barely hours after the December 2015 ranking rewards were released, which included guns from the US Navy's Iowa-class battleships, paving the way for future inclusion of American ship girls, discussions are already getting... interesting... about whether or not they should be included in the game at all (moreso the fact that there are still a lot of Axis Kanmusu yet to be introduced in the game. See Schedule Slip entry on the Trivia page.)
    • Whether the Abyssal Fleet is actually the Allied Fleet is a sore point of debate, especially for those who come from countries that were Allied in World War II (especially the United States). With the reveal of the USS Iowa, some fans, while relieved that the whole idea of "Abyssals = Allies" is quite possibly false henceforth, do wonder what exactly the Abyssal Fleet is a stand-in for now, given that most if not all of their areas of operation and the ship girls' counterattack operations are uncannily similar to Real Life World War II ones, plus certain enemies use Bland-Name Product versions of American planes and weapons.
      • On the other hand, their recent Abyssal additions imply they're trying to have them represent every nation involved in WWII, with characters such as Heavy Cruiser Princess, who shares design traits and voice acting with the italian Zara-class and Destroyer Ancient Demon/Princess, who dresses in a kimono like the Kamikaze-class (and sharing VA with Kamikaze), not to mention the abyssal bosses with evident resemblance to Jintsuu, Naka+Agano, Hagikaze, Mizuho, Harusame and Akizuki.
  • Character Tiers: Houshou, Maruyu and Ryuuhou are blatantly inferior to all the others within their type, though less glaring ones exist. For example, Furutaka and Kinugasa's Kai Nis were somewhat weaker compared to Choukai and Maya or the Myoukou sisters'.
  • Complacent Gaming Syndrome:
    • The varied fleet composition requirements native to some maps were actually put into place to avert this. Because really, it would be just so easy to make a default fleet made up of a pair of Battleships, Carriers, and Torpedo Cruisers, and steamroll nodes otherwise.
    • The PVP section is mainly this, though. A fleet of one torpedo cruiser (a high-level submarine works too, though not as effective as a torpedo cruiser), four battleships with good AA coverage, and any lead ship (the one you want to grind for Experience Points) wins against almost all other formations (even carrier-heavy ones). An exception occurs when the opponent fields an all-submarine PVP fleet, but in that case you should break out your destroyers, light aircraft carriers, and light cruisers which wins handily against them.
    • Some of the girls are so high on the Character Tiers that they'll almost always be used if possible. For example, the combination of Kaga Kai for having the largest air wing and Maya Kai Ni or the Akizuki sisters for their Anti-Air Cut-Ins is a very common sight whenever one expects to face many enemy carriers.
  • Crack Is Cheaper:
    • While Bribing Your Way to Victory is possible, it takes a lot of money to give yourself a significant advantage over the other players. Following the introduction of Large Ship Construction, trying to buy resources in real money to do LSC will turn this trope Up to Eleven. The game even warns players not to buy resources just to attempt LSC because of that. And under the marriage system, buying enough rings (700 yen each) to marry all the girls (151 as of 10 April 2015) would cost over 105,000 yen (not counting the free ring of course).
    • Averted for the game in general however, as it has been voted by Japanese browser gamers as the most fun-to-play and the cheapest browser game, which is one of the reasons for its popularity.
  • Creator's Pet: While not excessively so, Kaga and Akagi seem favored as they generally have pretty good stats for ships with only one remodel despite being the oldest active use Japanese carriers. It takes other carriers two remodels to rival or surpass them. Some joke about their second remodel breaking the game.
  • Crossover Ship:
    • There is a lesser known fan crossover between Kancolle and Axis Powers Hetalia, see Friendly Fandoms below.
    • From the Touken Ranbu/Kancolle front, there are several:
      • Mikazuki Munechika/Mikazuki in a grandfatherly relationship. This is to be expected since the shipgirl is ostensibly named after the sword (aside from the fact that it is also a month name, thus still confirming to the class' theme naming). In fact, shipping artworks featuring shipgirls and swordguys sharing a common kanji in their names is quite popular (i.e. Yamato-no-kami Yasusada/Yamato, Tsurumaru Kuninaga/Shoukaku).
      • Shokudaikiri Mitsutada/Tenryuu is also quite popular, because of their resemblance to each other and the fact that both has a predilection for caring others.
    • Iowa and Clownpiece, due to the former being the game's first US Navy kanmusu and the latter having an outfit modeled after the US flag.
  • Demonic Spiders: Just about any kind of enemy with a Flagship or Flagship Kai version qualifies.
    • Ru-class battleships are extremely resilient, accurate and more than capable of reducing any of your non-battleships to critical damage with a sideways glance.
    • Wo-class standard carriers. Especially the late model versions that are equipped with Hell Dive, Cat and Revenge planes, which will absolutely destroy your fleet if you don't bring a ton of fighter planes and a ship that can perform anti-air cut-ins. And they don't even have the courtesy to obey the same rules that prevent your carriers from launching at night or at medium damagenote .
  • Ensemble Dark Horse:
    • Among the ship girls released in Fall 2015 Event, Kashima has more fanart than the other three combined. Indeed, she's come to rival long-time fan favorite Kongou for sheer volume of fanart.
    • Days after KanColle Kai's launch for Play Station Vita players, Iowa received a similar reception to the point that she got Rule 34 images of her roaming around the internet almost immediately.
    • Some fleet girls woud gain a bit of popularity upon release of their second remodels, Yuudachi being one of the more well-known examples.
    • Surprisingly, Kaga is gaining a bit of a larger fanbase as well. Previously, she was seen as more of a boxy character with her stoic personality... Until Cape Kaga happened.
  • Evil Is Sexy: The more human-looking Abyssal ships have gotten this reaction from fans, to the point where some have wished for the option to play as the Abyssal Fleet, or at least have them come over to your side.
  • Face of the Band: Shimakaze is usually the first kanmusu that comes to mind for non-players whenever Kantai Collection is discussed, due to her memorable outfit.
  • Fandom Rivalry:
    • With Touhou, partially due to how various Pixiv artists appeared to have stopped doing Touhou fanart in favour of this game, and partially due to how the Touhou Popularity Poll made a simple question asking whether the person heard of the game. NOT helped by the fact that, during the most recent Reiteisai (an annual Touhou fan gathering), several Kancolle cosplayers "invaded" the proceedings. While this resulted in more than a little ruffled feathers, ZUN himself didn't seem to mind, and went on record to say that the two series actually work well together. Then again, Touhou and Kan Colle have quite a bit of overlap and while many artist jumped off Touhou and onto the Kan Colle bandwagon, many tend to draw both - also, many doujin circles still arrange both Kan Colle and Touhou, sometimes even on the same album. One could say that Touhou's and Kan Colle's Fandom are more friendly rivals than bitter enemies.
    • Some World Of Warships players, particularly those who do not play KanColle, get irritated with the influx of KanColle fans who play the game, especially those who spam memes in the text chat, most notably Yuudachi's "poi" Verbal Tic. Irritated players refer to those who do such as "Shipfuckers".
  • Fan-Preferred Couple: Of the Les Yay variety, no less:
    • Iowa's debut on KanColle Kai has her fans immediately pairing her with Kongou, followed by Iowa/Yamato and Iowa/Katori (the latter being a Historical In-Joke.)
    • And again with Kongou and Warspite upon her introduction in the Summer 2016 Event, due to their very similar origins.
  • Foe Yay: Whenever a kanmusu is shipped with someone/something from the Abyssal Fleet. The fact that the one of the Abyssal girls, Wo-Class, has tentacles does not help.
  • Fountain of Memes: Just about anything that Kongou shouts in Gratuitous English sticks with the fandom.
  • Friendly Fandoms:
    • With Axis Powers Hetalia. It probably helps that Japan's default outfit is the uniform worn by Kaigun officers, the fact that both series are themed around World War IInote , and the focus of both of the series isn't about the Japanese politics in World War II. With the introduction of Italian ships in the Spring 2015 Event, the Axis are now fully represented in both series.
    • Also with Touken Ranbu, mostly because said game is Kan Colle's Spear Counterpart and also hosted on the same website.
    • Kantai Collection players also often play World Of Warships at the same time, and it's not uncommon to find gameplay sessions of the latter with the ship girls' voiceovers slapped into them. However, not every WoWs player is amused by this; see Fandom Rivalry above.
  • Game Breaker:
    • This is the reason why Shinden Kai is to date still unavailable other than from the Spring 2013 event; fighter power is one of the very few mechanics unaffected by RNG, and Shinden Kai gives a lot more fighter power than the normal Reppuunote . The next best two, Reppuu Kai (from Spring 2014) and Iwamoto Squadron's Type 0 Fighter Model 53 (from Shoukaku-class quests) are this to a smaller extent, as they only give a bit morenote , but still enough to make a difference.
      • Trumping even the Shinden Kai is the aircraft proficiency system, which allows the planes to gain and lose ranks, essentially turning them into capable but fleeting pilots. However, having max-ranked fighters in your aircraft carriers can significantly inflate the fleet's air power regardless of plane slots, allowing the largest plane slots to be freed up for max-ranked bombers which can now break the damage cap, enabling the aircraft carriers to perform overwhelmingly powerful preemptive airstrike strong enough to annihilate almost anything at the receiving end of their critical hits.
    • The very first second remodels to be introduced in the game refits Kitakami and Ooi with the same quintuple torpedo tubes that was historically equipped on Shimakaze, boosting their already high torpedo stats to overwhelming propotions, allowing them to perform preemptive torpedo attacks and utterly destroy anything at the receiving end of their attacks in night battles with only two guns and a midget sub.
    • The Fog ships from Arpeggio of Blue Steel, who were usable for the duration of the December 2013 event. Despite starting at level 1, Iona, Takao, and Haruna all had high base stats that rival or outright beat fully-upgraded kanmusu, and what's more the latter two had a Graviton Cannon attack that can hit all ships in an opposing fleet. Iona herself was an egregious example, as she had 70 Health, which was ridiculously high for a sub, never mind her high Attack, high Evasion rate, high Speed, and long Range. Within a day of the start of the event, there were anecdotes of players clearing whole (non-event) maps with them, and their presence in a PvP team caused a lot of headaches.
    • Submarines in general are this. It is well-known that almost any map can be "subcheesed" (submarine cheesing), saving tons of resources that would otherwise have been spent clearing a map the conventional way. (To prevent this, late word maps have insanely high enemy ASW capacity and/or a high probability to encounter a dead end if you attempt subcheesing. Sometimes subcheesing outright fails fleet composition requirements) This also meant that Iona was on two levels of game breaking. At least she didn't have the Graviton Cannon, unlike in the anime.
  • Germans Love David Hasselhoff:
    • Surprisingly popular in China, to the point of having its own doujinshi convention there, considering that it's a Japanese game based on World War II. It probably helped that the Kaigun was nowhere as involved in China as the Japanese Army was. note 
    • Also very popular in Southeast Asia, another region that ironically was invaded and occupied by Japan during the War, with some of the ships even directly supporting the invasion by bombarding those countries. Filipino fans in particular are surprisingly aplenty; partly due to the massive number of the game's namesake ships sunk within and around its internal waters; and partly because one of the more popular browser addons that allow playing the game outside Japan was actually Philippine-made.
    • Unsurprisingly, USS Iowa is a hit with American fans. It helps that the real-life USS Iowa is such a well-famed battleship to the point that all the ships of her class were spared from the scrapyard, and were kept afloat to this day as museum ships.
  • Goddamned Bats:
    • Tsu-class light cruisers aren't that powerful or tough, but their ability to do Anti-Air Cut-Ins will destroy large numbers of your bombers, greatly weakening if not outright disabling your carriers' offence.
    • PT Imp Packs introduced in Fall 2015 Event. They have insane evasion, meaning that it's very hard to do even the tiny amount of damage needed to sink them. In the first two days it was even worse, because a bug meant that their designated counter, destroyers, didn't have the bonus against them that they were supposed to have. The stronger forms, being able to use Torpedo Cut-Ins, become Demonic Spiders.
  • Good Bad Bugs:
    • Enemy carriers, be it in sorties or in PvP, used to be able to launch planes at orange or even red HP due to a bug. This created jokes on how Ryuujou should be the only carrier to be able to do that. This bug has since been fixed.
    • Taihou and Akitsu Maru used to have swapped repair times (giving Taihou the repair time of a destroyer). This used to be attributed to damage done to armored flight decks being much easier to deal with than that to standard flight decks until this was fixed about a month after LSC started.
    • Due to a quirk of the game's programming, the same bonuses and penalties are applied to your fleet and the opposing fleet. This leads to ridiculous situations where getting, for example, a T-Cross Advantage (which is supposed to increase attack damage for your ships and decrease it for the opponent's, actually increases it for both sides. Similarly, getting a T-cross disadvantage decreases the attack damage for both sides.
  • Hilarious in Hindsight:
    • As soon as Kantai Collection got extremely popular, fanvids started popping up crossing the Armored Core series with it, due to how completely nerdy the fanbase is when it comes to mecha (that is, everybody; it eventually got it own tag called "Kan-CORE" and people have parodied the commercials for AC with Kancolle characters). Several months later, in early-mid 2014, Kadokawa announced they acquired 80% of FromSoftware (developer of AC; it should be noted Kadokawa has had a stake in From long before this), and this made the crossovers even more popular online. Time will tell if From ends up developing a Kancolle game for Kadokawa.
    • This 4koma as uploaded by Pixiv user "koketsu-ya" in 2014 depicts Kaga singing Enka, much to the amazement of the other fleet girls. Fast forward to mid-2015 and the debut of Cape Kaga.
    • One of the Unusual Euphemisms about Atago refers to her large "fuel tanks". Come Summer 2015 Event, there's an actual replenishment oiler, Hayasui, who is much less endowed.
    • Also, this was not the first time fans heard of Kongou's infamous Catch Phrase.
    • The announcement for the Winter 2016 Event to center around Operation Rei-Go comes off as this thanks to the brief debacle stated in the What an Idiot entry below.Explanation 
    • Back in 2015, DeviantArt user dishwasher1910 drew two pictures of RWBY's Yang Xiao Long as Iowa. Come 2016 and the release of Iowa's canonical design, which does indeed look like Yang.
    • One which crosses with the Anime adaptation: The mondegreen of the "Weigh Anchor" line from the Opening theme comes off as this as of the introduction of the Royal Navy in the Summer 2016 event.
    • The Greatest Generation predicted a recreation of the invasion of Malaya and the sinking of Force Z long before the Summer 2016 event made it canon.
  • I Am Not Shazam: Parodied; Fubuki's obscurity has led some fans to call her "Kantai" as a joke.
  • Incest Yay Shipping: A somewhat unusual case; fans have no qualms about shipping sister ships with each other (Kitakami/Ooi and Nagato/Mutsu, for example), but canon doesn't make it clear whether "sister ships" are actually blood-related or if being "sisters" is just a figure of speech for being in the same class.
  • Intercontinuity Crossover: With Arpeggio of Blue Steel, another series with anthropomorphized Kaigun warships, care of the anime's endcards:
  • It's Easy, so It Sucks: Every event after Autumn 2013 has been seen as this by veterans, as the developers removed gauge regeneration for every event thereafter. Then came the Spring 2016 event (see That One Level entry below.)
  • It's the Same, so It Sucks: Akatsuki's Kai Ni has caught flak with parts of the Western fandom for not changing a lot of her design and being plain. Shoukaku's Kai Ni has received similar criticism.
  • Launcher of a Thousand Ships:
    • The Admiral, for very obvious reasons.
    • Among the fleet girls though, Kongou is getting such treatment from fans. Counting the Anime, she has been shipped with the abovementioned Admiral, her sister ships, Fubuki (anime-wise), Iowa, and more recently Warspite.
  • Memetic Badass:
    • Fan artists (particularly on pixiv) have portrayed Kirishima as this due to the track record of her real-life counterpart. This is evident in the pixiv tag "It's mic check time, dammit!"
    • Both historically and in-game, Tenryuu has poor performance, statistically speaking. However, her Badass appearance has led to part of the fandom playing her up as someone who can punch out of her weight class.
  • Memetic Molester:
  • Memetic Troll: Tatsuta tends to be this in fanon, as a result of exaggerating her Gadfly tendencies towards Tenryuu. Danbooru has an entire pool devoted to these tendencies, called "God Damn It, Tatsuta!"
  • Moe: All the ship girls' designs definitely lean in this direction.
  • Most Annoying Sound: You will quickly grow to loathe the moderate damage lines, because it means someone screwed up.
  • Most Wonderful Sound: The critical hit explosion, especially when your fleet makes one after the other, sinking or crippling enemy ships one by one, and punctuated by their battle cries. In contrast, the explosion sound from a regular hit feels pretty small.
  • Never Live It Down:
    • Despite なのです (nanodesu) appearing in only one line (or two, depending on technicality) for Inazuma in the game(initially, at least; she was later given two new lines with nanodesu in it, which is still not that frequent), fanon has it as her Verbal Tic and/or Catch Phrase.
    • Kashima apparently gets this treatment as well. Thanks to some of her lines which come off as flirting and her "openly suggestive" default damaged art, she has garnered a lot of Rule 34 art. This is even despite fans generating a Danbooru art pool of her as an innocent fleet girl, aptly titled "Kashima is a Good Girl"
  • Nightmare Fuel: Central Hime's damaged artwork is, plainly put, gross. While most damaged Abyssal boss artwork only applies Clothing Damage with some Tainted Veins, Central Hime's skin is torn off, showing the black and red muscles beneath her skin.
  • No Yay: People who don't like shipping the kanmusu with Wo-class often cite that the latter has tentacles, which somehow makes the yuri no longer 'pure'. (This is logic stated about things with girls with something 'extra' in general)
    • Among some Western fans, any ship that involves Northern Ocean Princess, a Destroyer or the younger looking submarines.
  • Soundtrack Dissonance: The Latter Stage operation during Spring 2016 Event has a well-deserved BGM for the overworld map and boss battle... but the normal battles have an upbeat soundtrack that sounds like a music straight from a clown fiesta, which would've been better suited for airfield construction at E3 rather than recapturing an allied anchorage.
  • The Scrappy:
    • For normal ship construction (which has since spread to map drops as well), Light Cruiser Naka. This is due to her high-than-normal chance of appearing in any crafting recipe where a light cruiser is a possibility, particularly in battleship or recipes used for rare ships. Disgruntled admirals, annoyed at how their hard-earned resources went to waste, just scrap her on sight as a result. She gained a second remodel (who actually has good stats, particularly against submarines), but this generally just means people just keep one, and still scrap the clones.
    • For Large Ship Construction, Light Carrier Jun'you if one is trying for Armored Carrier Taihou. Disappointed admirals joke (like on Twitter) that their "Taihous" are always drunk as a result. Same goes for Mutsu if one is trying for Bismarck or a Yamato-class, to the point where fans have decided her main armament is the "MNB" (Mutsu ni Naru Beam, a.k.a. "Turn Into Mutsu Beam").
  • Scrappy Mechanic:
    • An aircraft carrier must carry torpedo bombers but not dive bombers in order to be able to attack installation bosses. For example, a carrier carrying just one torpedo bomber can attack them, but a carrier carrying three torpedo bombers and one dive bomber cannot. In addition, the situation is reversed during the aerial phase; dive bombers can attack installation bosses but not torpedo bombers. This mechanic has naturally led to much confusion among the players.
    • The ship lock mechanism in the events, where a girl used in certain maps cannot be used in others, is very troublesome for less experienced admirals who don't yet have a large number of high-level girls across all classes.
  • Shipping (heh heh): With over a hundred female characters, yuri shipping is inevitable. Touhou girls beware, they have a real contender this time. There are also pairings between the fleet girls and the Admiral (regardless of said admiral's sex), but this ultimately falls under the Admiral-Artist's personal preference. Just look at the sheer variety of Admiral-Ship pairings available in Pixiv, for example.
  • Tear Jerker:
    • Considering these characters are modeled after Japanese World War II ships, it's quite easy to find plenty of fanart and videos that depict their fates during or after the war. If you're attached to these characters, you'd be best to prepare some tissues. For some, their sinking lines alone would be more than enough.
    • Alternatively, any carelessness that results in the sinking of your ships will cause their souls to turn into demons due to their grudge (Though there is no official mention of this and mainly depicted in fanworks, the grudge itself is mentioned in the official 4-koma, and is the main objective and reason why these ship girls are trained and, in some extent, deployed in the first place). So if they die, you're responsible for sending these girls to be your enemies in the future.
  • That One Boss:
    • The Fall 2013 event's Ironbottom Sound boss, Airfield Princess (飛行場姫, Hikoujyo Hime, aka Evil Henderson Field to Western players) is the prime offender of this trope. She has 500HP, can't be attacked by torpedoes, is accompanied by other strong mooks, and is capable of dealing significant damage to your girls enough to bring them down to low HP. Not only that, without Sanshikidan/Type-3 (三式弾, an anti aircraft ammo), any damage dealt to her is considered insignificant and bringing her down is going to be a lot harder than it already is. To make things worse, the stage leading up to the boss itself is entirely night based. Which means all stats, including yours and the enemy's, are severely raised to critical levels where, if you're unlucky, you're most likely going to retreat halfway for repairs, making reaching the boss itself even more of a challenge.
    • To a lesser degree, the second stage of the above mentioned event is a lite version of Ironbottom Sound. Not hard, but extremely frustrating. The only difference is that Airfield Princess actually regenerates if you don't clear the stage as quick as possible, while the boss of the second stage at least can be cleared at your own pace.
    • Summer 2015 E-3 (out of seven maps) boss medium final form and hard all forms composition has Seaplane Tender Princess (350HP) escorted by two Aircraft Carrier Demon (250HP each). The Seaplane Tender Princess has a preemptive torpedo, meaning she can potentially strike one of your girls to orange or red right off the bat, while the Aircraft Carrier Demons carry a large number of enemy planes, meaning you'll probably need to take slots away from bombers in favour of air-to-air if you want air superiority. For a map only halfway through the Event, it's a major pain.
    • Summer 2015 E-7's boss, Air Defense Princess, has a whopping 395 armour in Hard mode, making every other previous boss look thinly-armoured, and 390 Anti-Air stat, rendering bomber aircraft effectively useless. It is escorted by a Battleship Princess (two in Hard Mode final form). It is possible to lower her armour, but that requires sinking the flagships of certain other nodes led by Flagship Kai Wo class, Isolated Island Demon or Seaport Princess, and this effect resets daily. To add insult to injury, bringing any torpedo cruisers will send you to dead ends, meaning without Abukuma Kai Ni you can't bring powerful preemptive torpedoes to take out her escorts as you could against previous bosses. Post-event statistics show that of the about 70% of players who took part in the event, only 45% of them actually managed to beat her at all!
    • Seaplane Tender Princess returns in the Fall 2015 event due to appearing as the boss of the third map. Unlike the Summer 2015 event, where her opening torpedo would miss due to the accuracy penalty from the formation she is in, this time, her formation raises her torpedo accuracy, thus making it highly likely that she will incapacitate one of your ships.
    • Central Princess from E-6 and E-7 of the Spring 2016 Event takes Damage-Sponge Boss to truly insane levels, sporting an incredible 900 HP in her final form in E-6. Making matters worse, she's always accompanied by other Princesses. While her health is lowered slightly in E-7 to 850 HP, all of her other stats have been buffed.
  • That One Level:
    • Okino Island Waters, better known as 2-4. It has been known to be notoriously hard, with as much as five battles in a row (which means, if you had triggered night warfare even once, you'd run out of fuel and ammo.) as well as Battleships and Air Carriers plaguing almost every node. So much that the recommended fleet composition for this stage is 4 Battleships and 2 Aircraft Carriers. note 
    • Kiss Island Shores, also known as 3-2, is only clearable with a fleet consisting of only Destroyers (anything else will redirect you north immediately, where reaching the boss is literally impossible), and you will encounter at least one enemy Elite Battleship along the way, which may or may not instantly send one of your ships into heavy damage, usually forcing Admirals to retreat to avoid their ships being sunk for good. To add insult to injury, it isn't even guaranteed to reach the boss node, so you can squeak past the pre-boss only for troll compass to send you to a dead end. The July 17th, 2015 update makes it slightly easier by allowing the use of a light cruiser flagship.
    • The Northern Sea Decisive Battle, otherwise known as 3-4, is by far the most luck dependent map in the game. While it has no fleet requirements, so you're free to bring whatever ships you want, there are a minimum of three battles before the boss node and two of which are guaranteed to have Elite or Flagship Ru-class battleships, and possibly elite Wo-class carriers. The last node before the boss itself commonly has two Flagship Ru-class and two Elite Ru-class, all of which are capable of inflicting critical damage to any of your ships in a single shot. Additionally, the branching is completely randomized and two routes go through fuel/ammo maelstroms, either of which can make victory at the boss nearly impossible, assuming you were lucky enough to get there in the first place.
    • The Forefront of the Southern Sea, 5-1, has strict fleet composition rules to reach the boss, requiring you to bring two destroyers and two aviation or heavy cruisers to guarantee it. Otherwise, there is a high chance of being sent off course. That leaves room for only one battleship and one carrier if you want a second shelling phase and air superiority. That's not the hard part. The hard part comes in that of the five quests that require you to sortie a specific fleet composition to it, three of them not only are such that there's no guarantee of reaching the boss, they make getting air superiority impossible. This means that you have to contend with enemy artillery spotting, further increasing the likelihood that someone will take critical damage even before reaching the boss. Of those three, two of them only allow a single light cruiser, which means getting the quest-required S-rank can be difficult if the boss composition is the one of three that includes a submarine, as taking medium damage is enough to greatly lower ASW power even with a full ASW equipment setup.
    • Sav Island, aka 5-3, has very strict fleet composition rules if you want to reach the boss, with any more than 2 battleships or even a single carrier or light carrier sending you to incredibly dangerous dead ends. In addition, it forces your fleet to go through at least two night battle only nodes filled with Flagship-grade heavy cruisers, battleships and submarines. And the boss itself has the Southern War Princess as back up.
    • ...and if you somehow managed to clear all of those maps, you'll definitely be in for a shock at Level 6-4, as said map pits you against an installation boss, the only non-Extra operation or time limited map to feature one as a boss thus far. Between the somewhat restrictive composition and very powerful enemies in its path, the easier path from the west keeps you from bring much of any air power at all due to the restrictive branching route mandating a light-sized fleet, making it rather difficult to secure the air superiority for artillery shelling, while the eastern path pits the heavier fleet against So-class submarines and Aircraft Carrier Princess. To top it all off, said boss was escorted by coastal defense mooks, and unlike the Fortress mooks, they have the armor and firepower that is comparable to battleships. Without WG42 or Daihatsu Landing Craft, both of which are very rare equipments pre-stocked from some of the rarest shipgirls in the game, your destroyers and light cruisers wouldn't stood much of a chance against them.
    • Counter Attack to AL/MI Operation, the final stage of the Summer 2014 event, became this for players who dared to challenge it due to its ridiculous combination of game mechanics (Air Power and Line-of-Sight played a huge role once again) and difficult enemies (with even destroyers that have been shown to be capable of reducing Yamato-class to less than 25% health in one hit) made it a battle of sheer attrition to even get to the boss. The boss itself was the Battleship Princess again, but to add insult to injury if the player's HQ level is lv 100 or greater, the final battle pits the player against two copies of her.
    • Summer 2015 is in the running for one of the most difficult events in the game's history, but Operation FS, also known as Summer 2015 E-7, deserves special mention as it has several factors that makes it extremely difficult. Firstly, it has random branching routes which can lead you off course on top of very powerful enemies scattered throughout the map, which includes Seaport Princess and Isolated Island Demon along the path, and the pre-boss node is guarded by either Flagship-tier carriers or battleships and Battleship Princess, even on "Easy" mode. Additionally, you have to stage several assaults against the installations through the map to reduce her armour. To top this all off, the armor reduction effect that comes from defeating the sub-bosses resets at midnight JST, meaning that you'll have to repeat the lengthy and costly process of weakening Air Defense Princess if you fail to defeat her in a single day.
    • To a lesser extent, Summer 2015 E-4 is also quite difficult due to a Morton's Fork at the boss final form. You can choose the north route, where the enemies have Took a Level in Badass over the initial compositions, or the south route, which makes you go through two compulsory night battle nodes (though, unlike the north route, they have been weakened). The boss herself is a rematch with Airfield Princess (see That One Boss, above), this time, escorted by two Ru-class battleships.
    • The entirety of Spring 2016 Event may count as this, as each map has their own share of nightmares. Combined with the fact that it is a large-scale event (a total of seven maps, though one of them is optional, it basically is the in-game equivalent to Welcome to Hell. When the devs said that the event will be an "all-out war", they were not kidding.
      • E1 has a Ta-class battleship as the boss. Seasoned admirals might think it easy compared to previous event maps which had an Abyssal Princess as an escort, if not a boss... except that this time around there are two nodes right after the seaplane scouting node, with a tough pre-boss battle beforehand especially in Hard Mode, since the flagship can be either the Battleship Princess or Aircraft Carrier Princess. Have fun wading through them throughout the clearing runs.
      • E2 is similar to Winter 2015 E2, if much shorter map... but that's the least of your worries, because now you have the same Artillery Imp as the one in Map 6-4 as the boss escort to deal with. And they still needs the same rare equipment to be taken down. Chances are high that you might lock out most of the Daihatsu-carrying destroyers here. All of this is before the fact that the final boss can show up before you even get to the final kill (although in a weaker form) and ruin your chances at random.
      • E3 is easier compared to the most other maps in this event, much to the relief of many Admirals, being significantly toned down from the one back in Fall 2015. The catch: there are Chi-class torpedo cruisers blocking the path to the resource landing node, which could seriously damage your fleet if they are left unscathed into torpedo phase.
      • E4 sees the return of Heavy Cruiser Princess, and is once again heavily guarded by either Battleship Princess or Aircraft Carrier Princess at pre-boss node depending on fleet type, with no way to Take a Third Option. This creates a case of Morton's Fork between sailing through hails of shells from the former or having many of your planes shot down before the latter bombs one of your shipgirls. And although the boss has much weaker flunkies this time around, she still has very high armor. If you haven't considered locking some of your more powerful destroyers, you certainly would now. Getting through all that isn't too hard for an experienced Admiral, but that's because they haven't seen what lies beyond yet...
      • E5 is basically E2 on steroids. Good news: there's no hardened installation. Bad news: while on E2 it's possible to send CVL with you on safe route to get air superiority, and not having air superiority only means no double attack for you (since none of the enemy at boss node can double attack you in daytime), you can't on E5 if you want to take the safer south route. To get at least air parity, you have to use a loadout with Akitsumaru or 2BBV and some CAV with multiple Seaplane Fighters. And said loadout means that you'll be at boss node with very little fuel and ammo, and you might really want to save Akitsumaru and BBVs for E-6. And if you don't get AP at boss node? 2 Ru-class Battleships will be there to pummel you with their double attacks! Oh, and also good luck getting through the air raid node safely! Finally, while this map is optional to reach further maps, you have to beat it if you want a third air base for easier time at E7 or more interceptors. Or Pola.
      • E6 is the worst offender of the bunch, as it combines the absurdity of both the final maps of the previous two Summer Events and takes it to even greater heights. The final boss of Kancolle Kai is buffed even further-she actually has 900 HP as opposed to 800 in Kancolle Kai-and is guarded by even more powerful escorts, this time by three Princess-tier Abyssals and two Artillery Imps. Furthermore, you cannot bring any of the ships from previous maps or send any land-based air support here. To make things worse, the boss debuff mechanism is a serious case of Guide Dang It that was not deciphered until a week after the beginning of the event. Even with it, the Central Princess is quite powerful, and that's before mentioning the amount of enemies that could easily survive into night battle. The only reliable way to defeat the Central Princess is by scoring a critical hit to kill the boss the boss during initial airstrike... which itself is a Luck-Based Mission; it's nearly impossible to do it by any other means. The only good news is that her debuff mechanics doesn't get reset everyday or on changing difficulty, so it's possible to debuff Central Princess by debuffing her on E-5 and here on easy first before tackling her on a harder difficulty.
      • E7 is almost agreed universally to be the hardest map to clear throughout any of the events released so far and easily tops any previous ones. You have 2 paths to take, but either one of the paths taken has nodes that can easily beat you back to square one and try again. This is because, similar to Spring 2015, you can encounter previous bosses in the normal nodes. When you finally reach the last phrase of gauge chipping and ready yourself for the final battle, the map nodes change drastically, with a severe Difficulty Spike, such that if luck isn't on your side, you may be stuck for days or weeks, or begrudgingly lower the difficulty in order to get a better chance at clearing the map. Furthermore, at the hardest difficulty, the boss composition is composed entirely of boss characters. 6 of them, led by Central Princess, who despite having slightly lower max HP - 850 as opposed to 900 for E6 - makes up for it by being buffed in all other stats. While you can rely on Land Based Aerial Support to bring her health down to 0, the highly RNG-dependent nature of the game means you need to go through a lot of trial and error in order to take her down. The majority of the players who have cleared Hard mode of the previous events actually put aside their pride and went Easy mode just for this map due to how gruesome the setting is. The only good news are that you have no ship lock restriction (unlike Summer 2015 where ships sent to E-5 cannot participate in E-7), Land Based Aerial Support gets massive damage boost against targets in boss nodes, and Central Princess in E-7 gains massive vulnerability to Type 2 Tanks.
  • That One Sidequest:
    • There are a number of quests that require you to clear maps without using battleships or standard carriers. They are as much of a pain as you might expect, since the maps in question often involve fighting the very classes you're not allowed to bring. Even worse if the quest calls for a S-rank, as not having a battleship means you lose out on a second shelling phase, which can easily make the difference between getting it and letting even one Abyssal survive.
    • Additionally, any quest that requires a Rare Random Drop ship. Examples include getting all four Kongou class battleships to unlock your fourth fleet, having Akashi as your flagship, getting Akagi, Kaga, Soryuu and Hiryuu, and clearing Expedition 39, which requires FOUR submarines and Taigei.
    • B44, 海上突入部隊、進発せよ!/ Deploy the Marine Rush Fleet! To even unlock it, you must first go down a very long chain of quests: Bd5*:  -> Bw2*:  -> Bw5*:  -> Bw6*:  -> Bw8*:  -> Bw9*: . All of these need to be done within one week, with all the resource expenditure you might expect from rushing that. And even after you have unlocked it, the required fleet composition*:  means you're not even guaranteed to be sent to the boss node. To top it off, the reward for clearing it*:  is quite unrewarding*:  for all the troubles you have went through to clear this quest.
    • Any quests that involve you playing the gambling game with RNG for map routings in order for you to be able to complete it. For example: daily quest Bd7 (defeat 5 bosses in World 2). Sounds easy on paper, until you remember the only map in World 2 with guaranteed path to the boss node is in 2-5, and that's not taking into account the damages that your fleet will get inflicted with before you make it to the boss node. If you choose to clear the simpler maps in World 2, you can be thrown off route despite fulfilling some requirements - for example in Map 2-2, 2 carriers give you a 70% chance to be routed to the boss node if you go to node E, but the starting point is random which means you can always start at A and go way off-course without hitting node E even once. And even if you land at node E, you can always be led away from the boss node despite fulfilling the routing requirement mentioned.
    • The infamous Souryuu Kai Ni 4-3 quest requires you to S-rank the boss node of 4-3 with Souryuu Kai Ni, Hiryuu Kai Ni, two destroyers and two extra ships. While the comp is powerful enough to fight the boss, the problem is getting there; having two destroyers automatically sends you to the north of the map where there is very little chance to get sent back to the center of the map where the boss node is.
  • They Changed It, Now It Sucks:
    • Kongou Kai 2. While the Japanese fanbase reaction so far has been positive, a lot of western fans don't think that way, and they actually prefer the old Kongou design more. Considering how Konishi's art style has been evolving, it wouldn't be farfetched to say that Kongou after her second remodernization looked far different than the old one. The change of her voice (same CV, but somewhat different tone) also provoked a (relatively) low degree of negative response.
    • When her sisters got second remodels, their new art got the same reaction from the fans, albeit to a lesser extent as compared to Kongou herself since everybody already knew what to expect. This still didn't stop grumbling at the varying quality however — for example, Haruna's 2nd remodel art is considered far far superior to Kirishima's.
    • There was an outbreak of remarkably racist commentary in the Japanese fandom when the slightly tanned Hiryu Kai 2 dropped, with a vocal minority of Japanese players calling her a "Filipina/Indonesian Whore" just because she had a light tan. Where these people were when the actually dark-skinned Musashi happened is anyone's guess.
    • Murakumo's Kai 2 didn't even come out for a day before receiving a torrent of derision from Western fans. It was received quite a bit more positively among Japanese fans, as the amount of fanart of her new design shows.
    • U-511's change to Ro-500 has very mixed reactions from both sides of the sea as the former's design was unique compared to the latter's (which is similar to most subs in the game but with a tan). The fact that this third remodel doesn't boost her stats at all is insult to injury despite coming with one of the strongest torpedo weapons in the game. Gag comics have been made about Hilter finding out and being unhappy.
    • Kawakaze's Kai-2 art also got a bit of flak from fans as the smug smile and midriff she had in her base and Kai forms were removed for a supposed ninja-like appearance.
  • Tier-Induced Scrappy: Submarines in Practice Sorties against other Admirals, at least during the game's early years. While vulnerable to light cruisers and destroyers, many Admirals preferred to fill out their fleet with heavy hitting battleships or carriers, which made defeating fleets with multiple submarines exceedingly difficult. This was remedied in a later update that let players select fleet formation during practice sorties, allowing one or two light cruisers/destroyers in line abreast to effectively counter submarines. That said, a mixed fleet of surface combatants and multiple subs is still a pain if you're hoping for a S-rank.
  • Unintentionally Sympathetic: Some fans can't help but view the Abyssal Fleet sympathetically; after all, in-game they exist only to be sunk by the players' fleets. Of particular note is that the Abyssals that got the most attention from fans were the Wo-class aircraft carriers, of all things. Said vessels were also the frequent subjects of various Heel–Face Turn situations in fan depictions (the reverse is also true especially when you let your ship girls sink, at least according to popular fan assumptions anyway), not to mention being the numero uno fan favorite for couples either involving the Admirals themselves or other ship girls. It's got to the point even the official anthologies feature sympathetic Wo-class.
  • Vanilla Protagonist: Fubuki is essentially made to be this, which probably explains why she's so low on everyone's radar.
  • What an Idiot: The recent debacle about DMM temporarily blocking IP addresses from the Philippines began from a post by a player in a KanColle group on Facebook, airing out his frustrations on the Large-Scale Construction while making blind accusations as to other players who "allegedly" hacked their way into the game to get rare ships. This caused brief panic from Filipino players who only relied previously on cookie editing to access the game. Fortunately it only lasted for a full day.

     Tropes Present for the Anime 
  • Alternate Character Interpretation:
    • Both the Admiral and Nagato are subject to this after episode 3. Are they commanders forced to make tough decisions that might result in having to sacrifice some of the girls? Or are they completely incompetent commanders that get their girls sunk for no real reason? Take note that, historically, Destroyers were the most numerous ship type fielded by the Imperial Japanese Navy, and were constantly in harms way...
    • Episode Seven notes that the Abyssal Fleet may be tapping into radio communication, which may explain some of the unforeseen surprise attacks.
    • The accusations of incompetence mostly come from players viewing details in the anime through the lens of the game's mechanics. For example, the so-called shortage of instant-repair buckets mentioned in the series is something that no self-respecting player would allow to happen (especially during build-ups to seasonal events). In the real world though, things aren't so simple, and historically the Imperial Japanese Navy's supply lines were stretched thin, especially after the Allies started interdicting their merchant shipping. Another example comes in the infamous "sink at full health" complaint.
    • Kongou, particularly when we get glimpses of a much more mature and sensitive side of her. Is she really that ditzy yet competent? Or is the goofball all a facade? Or is she loopy because of being a Shell-Shocked Veteran?
  • Americans Hate Tingle: English-speaking watchers (or those who bother to post on it) have a rather dim view on the adaptation (see both the Himeuta.net and World of Warships threads on it), to say the least.
  • Asspull: Episode 12 is highly guilty of this.
    • First, Zuikaku and Shoukaku, who in Real Life could not participate in Operation MI due to previous battle damage, suddenly appear as reinforcements by explaining that instant repair buckets suddenly appeared for them to use.
    • Second, Taihou's introduction is sudden and appears out of nowhere, and she only shows up to provide some extra air support without further development.
    • Third, the Admiral suddenly returns to the Naval District, with absolutely no word on how exactly he got back or what he was doing the entire time he was absent.
  • Awesome Music:
    • "Miiro" by Akino from bless4. Double points for sounding remarkably similar to the first theme song of Arpeggio of Blue Steel - Ars Nova. If the English translation of the song is to be believed at the link, it has quite a tear-jerking theme. Even if you somehow disregard the vocals, the off-vocal version still has epic riffs. It's also used as the music for the boss nodes in the winter 2015 event in the game.
    • Fubuki, the ED.
    • The soundtrack is noted for its full use of slow and powerful orchestral pieces at the most crucial moments, while also incorporating a mix of lighthearted themes.
  • Broken Base: Boy, is it ever. Vocal Minority is well and truly in effect, especially for English-speaking critics.
    • Kisaragi's sinking in episode 3 split the fanbase into several factions. Some fans don't like the direction the series is going, while others are looking forward to it. Others feel the event in question was incredibly contrived and done merely to stir up drama.
    • The fact that the bulk of the episode 3 was a Cliché Storm of generic anime death flags and it all happened nearly identically to Mami's death in episode 3 of Madoka Magica left quite a few people rather annoyed.
    • Episode 4. Showing Mutsuki in denial, and the morale of all the Destroyers at an all-time low? Expected. Dropping the wacky antics of the Kongou sisters into the middle of all this gloominess? Not so much.
    • An example from before the anime begin airing: The fandom is divided on whether they want to see the Admiral's character appear in the anime, or not. Despite an excerpt of an interview mentioning the Admiral's existence won't be shown on-screen, some fans who wanted to see his character have blasted the series for it after it began airing. Unfortunately, events late in the show wind up not helping the matters, as the events make the Admiral, an offscreen character, suddenly important by having the Abyss seemingly kidnap him and by having some intrigue as to why he elected Fubuki of all people to be a Flagship. Some of the discontent the fans felt regarding this was also caused by the fact that in the metagame, the Admiral is an entity similar to the Producer character in The Idolmaster series. Within the same season the anime is airing, THE iDOLM@STER: Cinderella Girls also aired, and it featured a Producer character who exploded into popularity just within hours after its first episode aired and topped the popularity poll multiple times. As a result, some fans also wished that the anime did the same.
    Q: What's the current take on the released key visuals for the anime (referring to Kaga, Fubuki and Akagi)?
    A: The basic story is on the main character, Fubuki's growth, her yearning to be like Akagi, and Kaga as Akagi's partner. Other appearing characters are still secret for now. The admiral exists but he will not be shown on-screen.note 
    • Fubuki herself is a point of contention among watchers, due to her somewhat bland nature compared to her co-members of the fleet. This, despite the fact that in staff interviews prior to the airing of the anime repeatedly mentioning that the anime was a vehicle to increase her appeal. Granted, this perception was not helped in the eyes of some players by the fact that Tanaka, the lead producer for the game, is a big fan of hers.
      • In addition, the fact that the anime shows the Admiral dreaming of marrying Fubuki has further polarized Fubuki fans from non-Fubuki fans.
    • People are split over whether or not the show should follow its historical routes or stick with Slice of Life. It doesn't help that the anime teeters on both, occasionally dipping into one extreme one episode and diving into another extreme almost immediately.
    • The announcement of a second season has one set of fans happy that the series will be continued, while another set are angry because they feel Diomedea dropped the ball on the series and they would rather have the series stay dead or see a different studio take the reins.
    • The Reveal in the final episode that heavily implied Kisaragi was turned into an Abyssal had her fans up in arms.
  • Creator's Pet: The Anime's producer is a self-admitted Fubuki fan, explaining how much emphasis she gets.
  • Critic-Proof: The series is, by all measures, a best-seller, forecasted to sell more than twenty-thousand units in total. Among many fans however (especially the older ones), the series was panned particularly badly, especially the final two episodes.
  • Ending Aversion: According to opinion polls, episode 12 is generally considered the worst episode of the series due to the rushed conclusion and further decline in the animation quality.
  • He's Just Hiding: A good chunk of people spoke up about Kisaragi's sinking, saying that she'll either come back or that she can be savable, the latter often getting pointed out that sinking in the game is essentially game over. It repeats again during Episode 7, as some people are mixed on whether Shouhou sank or not. Half say yes due to the historical accuracy and the other half say no due to, among other reasons, the person not saying her sink line.
  • Hilarious in Hindsight: The Big Damn Heroes intercept on an abyssal's dive bomb for Akagi, courtesy of a Yamato-led main attack force (though to be more accurate, it was Fubuki who fired the intercepting shot). Someone went ahead and superimposed the Freedom Gundam in the scene, just to drive the point home.Explanation 
    • Fubuki's worship of Akagi comes off as this to those who watched the anime first and then read the manga Fubuki Ganbarimasu. In the anime, Fubuki reaches for every chance to prove herself worthy of becoming Akagi's escort. In the aforementioned manga, Akagi's appetite and Kaga's overheating rigging means that Fubuki and most of the other ships are quite wary of the two carriers. At one point Fubuki is looking for a carrier escort and sees them, only to quickly rush past them and plead for Hiryuu and Soryuu to join the mission instead. Later, Fubuki finally asks them to join a mission out of pity.
  • Hype Backlash: The anime suffered from this greatly. When the first PV aired, fans were eager to see their favorite game animated while newcomers were interested in the concept. However, once the anime aired, it failed to live up to the existing fans' expectations and newcomers either dropped the series early or avoided it altogether.
  • Nightmare Fuel:
    • In episode 4, the Slasher Smile one of the Ru-class gives a floundering Fubuki is so unnerving, it wouldn't be out of place on the Joker. It all but screams 'I'm going to enjoy killing you'.
    • In episode 11, seeing Operation MI going wrong, with the girls growing increasingly desperate and haggard under the Abyssals' onslaught. Twice.
  • Pandering to the Base:
    • The first episode is pretty much twenty-four minutes of fanservice to players of the game.
    • On the other side, there are some fans of the game that feel that the anime is deviating too much from the source material (Heavy emphasis on yuri despite being very subdued in game, simplification of characters like Hibiki and Ooi, implementing references to game mechanics only when its convenient for drama, etc).
  • Suspiciously Similar Song: The opening song, "Miiro" by Akino of Bless4, to "Savior of Song" by Nano and MY FIRST STORY (coincidentally from Arpeggio of Blue Steel: Ars Nova).
  • The Scrappy: Most people are quick to blame Nagato, as she was the one in command during the mission that wound up killing Kisaragi and the Admiral, while mentioned, does not have actually have any onscreen presence.
    • Ooi and Kitakami's appearances are prone to being considered the low points as they tend to disrupt other scenes.
  • Shocking Swerve: In episode 3, Kisaragi is sunk in the aftermath of the battle for W Island, which is a huge departure from the first two very lighthearted episodes. It doesn't help that Kisaragi barely qualified as a Mauve Shirt.
  • Tear Jerker:
    • Kisaragi's rather untimely sinking at the end of Episode 3, especially given Mutsuki had earlier promised to tell her her true feelings and never got the chance. The episode ends with Mutsuki obliviously waiting at the cape for Kisaragi to return. Made even worse when you consider that W Island referenced Wake Island, where the real-life Kisaragi sank.
    • Mutsuki's speech to Fubuki in episode 10 after the latter was almost sunk. Not only is she talking in the way one would talk to someone who almost died due of being reckless but in the way that she already lost someone dear to her and almost lost another one. You really want to give her a hug after that.
    • In the end of episode 11, Akagi's reaction when she realised that her efforts to prevent Battle of Midway happening again is all for naught when a Abyssal Fleet ambushes her fleet. Her despair-filled assumption that You Cannot Fight Fate as a Abyssal Fighter drops a bomb at her is what really seals the deal. Even though she was saved by Fubuki in the very next episode, its still a really strong scene.
  • They Wasted a Perfectly Good Character:
    • The Abyssals in general, especially the humanoid ones. It's established that they are intelligent since they have the capability to intercept radio messages and use the intelligence to plan counterattacks and sacrifice themselves to protect other Abyssals, but otherwise never speak (with the exception of a single line of dialogue) nor show any signs of characterization or self awareness. Their only role is to act as Monsters of the Week.
    • There are questions as to who thought it would be a good idea to introduce Taihou in the very last episode of the first season with only a cursory introduction.
  • They Wasted a Perfectly Good Plot: The destruction of the main anchorage and the disappearance of the Admiral in episode 9, in any other show, could have been used to fuel all sorts of drama and even a few deaths. Here? It's immediately brushed aside because Nagato happened to have the ledger where the operations instructions were written. It says a lot when the disappearance of the commander doesn't even merit panic or a drop in morale, eh?
    • In a show about Kaigun ships, there will always exist the possibility to tell epic tragedy as the war turns against them and one by one they die in pointless battles far from home, either magnificently like Fuso fighting to the end, embarrassingly like Chokai losing a gun duel to a ship vastly her inferior, bushwhacked like Haguro, or sailing to a meaningless end like Yamato.
  • Uncertain Audience: What is Kantai Collection? Is it a slice of life anime with cute boat girls and a Monster of the Week formula? Is it trying to be Puella Magi Madoka Magica but with boat girls? A show where History Repeats Itself with Screw Destiny sprinkled in? Not even the writers are sure, as the tone bounces from one episode to the other.
  • Unfortunate Implications: Some viewers found themselves very uncomfortable with the historical revisionism present in the anime, where it not so subtly portrays the Kaigun "winning" the Battle of Midway.
    • Also, this forum post highlights the conflicting feelings in regards to episode 3, since the Battle of Wake Island also led to numerous atrocities on the civilian contractors and the native Chamorros.
  • Vanilla Protagonist: The anime is mostly Fubuki's story as she learns to be an effective part of the fleet. But she is alongside many more colorful characters that many viewers wanted more focus on. The nonsensical in-universe reason for her even being at the (front-line) base did not help: the Admiral had a dream about marrying her.
  • Visual Effects of Awesome: The Arming and Launching sequence for the ship girls has probably the best animation in the series. It's also likely that one sequence ate most of the budget for the later episodes...
http://tvtropes.org/pmwiki/pmwiki.php/YMMV/KantaiCollection