History Literature / NinjaSlayer

** Episode 13 adds an EasterEgg from Film/BackToTheFuture in the form of the [=DeLorean=] DMC-12... ''[[LawyerFriendlyCameo as the Smiling Old Man's car]]''. In the dub, the Old Man even quotes Doc Brown by telling Silver Karasu that they "don't need roads."

[[Creator/StudioTrigger Studio TRIGGER]] (''Anime/KillLaKill'', ''Franchise/LittleWitchAcademia'') made an ONA series based on the Novels in Spring 2015... with a mixture of LimitedAnimation ranging from "Okay" to "Slightly improved WebAnimation/InfernoCop." The series was later broadcasted on Japanese television starting on April 2, 2016.

* AmbiguouslyHuman: Pretty much describes any Soukaiya or Survivors' Dojo member. The Dojo clansmen say they were once human before (forced) mutation. As for the Syndicate, it's rather ambiguous on whether their ninjas are mutants, cyborgs, monsters, or unaltered humans wearing PoweredArmor.

* ArtShift: The ONA constantly shifts from excellent animation to LimitedAnimation to slightly improved ''Inferno Cop'' style animation. How much it shifts depends on RuleOfFunny, especially in battle scenes.

* BeautyEqualsGoodness: Most of the heroes, such as [[CuteBruiser Yamoto]], [[BuxomIsBetter Yukano]], [[EveryoneLovesBlondes Nancy Lee]] and even [[TallDarkAndHandsome Ninja Slayer]] (sans his mask) are leaps and bounds more attractive than [[{{Gonk}} most]] of the villains, with some exceptions like [[WhiteHairBlackHeart Darkninja]]. Also subverted by the heroic Dragon Gendoso, if only due to his advanced age.

* IncomingHam: If the words start with "DOMO", expect whoever said it to come fully-loaded in pork power. The titular hero practically turns this into a [[UpToEleven life philosophy]]!

* StuffBlowingUp: It's practically a "tradition" around Neo-Saitama to see explosions go off, not just from the AwesomenessIsVolatile factor, but anytime there's a ninja turf war occurring within the city, which happens to be '''almost every single day''', so expect common sightings of wreckage and [[NoIndoorVoice screaming]] combatants around every open space area. Taken UpToEleven in the Season 1 finale when [[spoiler:the Soukai leader's sudden death creates a [[EvilPowerVacuum large-scale opportunity]] for the other rival factions.]]

[[Creator/StudioTrigger Studio TRIGGER]] (''Anime/KillLaKill'', ''Anime/LittleWitchAcademia'') made an ONA series based on the Novels in Spring 2015... with a mixture of LimitedAnimation ranging from "Okay" to "Slightly improved WebAnimation/InfernoCop." The series was later broadcasted on Japanese television starting on April 2, 2016.

* NotImportantToThisEpisodeCamp: Anyone who isn't a [[BitCharacter bit]], [[OneShotCharacter one-shot]] or [[MonsterOfTheWeek Ninja of the Week]]-type enters the camp at some point (even Ninja Slayer). The supporting heroines drop in and out of the limelight, one at a time, depending on the plot requirement. Each story arc does give some explanation, though:
** Yamoto is a matter of switched perspective since she's a HeroOfAnotherStory.
** Yukano's first absence (Episode 7-10) was due to nursing her poisoned grandfather, and her second (Episode 12-14) came from the result of being separated from Slayer and [[spoiler:losing her memories, subsequently joining Ikki Uchikowashi in the process.]]
** Nancy Lee spends her time between Episodes 13 to 18 setting up Ninja Slayer's plan to assassinate Laomoto Khan.

* LoadsAndLoadsOfCharacters: The series has a habit of introducing new faces almost per chapter. As of now, there are roughly 70 or more named characters in the span of just over twenty, 15 minutes long episodes. Most of them are just one-shot wonders, tho...

''Ninja Slayer'' is a series of novels allegedly created by American writers Bradley Bond and Philip "Ninj@" Morzez, who in turn gave Enterbrain permission to translate it in Japanese. The Japanese translation was posted on Twitter piece by piece on by the Japanese "Translators" Honda Yu and Sugi Leika. After the story got popular, it was published in novel form in 2012.

** Episode 16: Slayer reluctantly joins the LaResistance group, Ikki Uchikowashi, in order to keep an eye on [[spoiler:"Amnesia."]] He shortly finds out that they're NotSoDifferent from the Syndicate, and defects after slaughtering one of their field platoons along with its commander. Not only does this act puts him at odds with yet another villainous faction, it also sets up [[spoiler:Amnesia/Yukano]] as an antagonist.

* FamousLastWords: "Sayonara!!!" as said by, well, almost every villain-of-the-week.

* DiscoDan: Shogo, who's ninja soul has turned him from a shy, suicidal boy into a [[JapaneseDelinquents Japanese Delinquent]] version of this, complete with FunnyAfro.

** Episode 19 (English dub ver.) has Trufflehog/Warlock jokingly say [[Disney/TheLionKing "Hakuna Matata!"]] when commenting on his current body.

*** The same episode features Ninja Slayer wondering out loud if Nancy Lee betrayed him, before deciding that she would never [[Main/{{Rickroll}} give him up, let him down, or hurt him]].

[[Creator/StudioTrigger Studio TRIGGER]] (Anime/KillLaKill, Anime/LittleWitchAcademia) made an ONA series based on the Novels in Spring 2015... with a mixture of LimitedAnimation ranging from "Okay" to "Slightly improved WebAnimation/InfernoCop." The series was later broadcasted on Japanese television starting on April 2, 2016.

** '''Ninja Slayer:''' Creator/ToshiyukiMorikawa is already known for starring as a [[Franchise/DevilMayCry certain other]] [[RedIsHeroic red-clad]], [[LargeHam hammy]] asskicker in both the [[Anime/DevilMayCryTheAnimatedSeries anime adaptation]] and VideoGame/MarvelVsCapcom3. Much like Ninja Slayer, Dante is a HunterOfHisOwnKind.

** The Motoryabs of Episode 15 are very obvious spoofs of the ED-209 from Frachise/RoboCop, right down to the "polite but lethal" attitude said robots were (in)famous for.

* GratuitousJapanese: Even in the ''original Japanese version'', as everyone, regardless their standing, uses the ''-san'' honorific. This is also done textually by using the "=" symbol before the "san" as a way to replicate this in Japanese.

** The Motoryabs of Episode 15 are very obvious spoofs of the ED-209 from Frachise/{{Robocop}}, right down to the "polite but lethal" attitude said robots were (in)famous for.

** The same episode features Ninja Slayer wondering out loud if Nancy Lee betrayed him, before deciding that she would never [[Main/{{Rickroll}} give him up, let him down, or hurt him.]]

* FantasyKitchenSink: From {{Ninja}} to KamenRider to [[HollywoodCyborg Hollywood Cyborgs]] to GothicHorror fiction... and the list goes on.

[[Creator/StudioTrigger Studio TRIGGER]] made an ONA series based on the Novels in Spring 2015... with a mixture of LimitedAnimation ranging from "Okay" to "Slightly improved WebAnimation/InfernoCop." The series was later broadcasted on Japanese television starting on April 2, 2016.

* TestedOnHumans: In-universe, the fictional criminal profession of a "cyber-tsujigiri" involves testing the latest BlackMarket weaponry on live targets.

** Here's one from the light novels. The "Three Dirty Ninja-Bond" arc features cover artwork that parodies none other than Film/TheGoodTheBadAndTheUgly's iconic poster. [[http://static.tvtropes.org/pmwiki/pub/images/ninja_slayer_three_dirty_ninja_bond.jpg Notice]] the [[http://static.tvtropes.org/pmwiki/pub/images/the_good_the_bad_and_the_ugly_poster.jpg similarities]].

* ScarfOfAssKicking: Ninja Slayer's red scarf. So awesome ''it's the only thing that's moving when the animation shifts to ''Inferno Cop'' style.'' And '''[[http://static.tvtropes.org/pmwiki/pub/images/ninja_slayer_magic_scarf.jpg suddenly becoming longer than NINJA SLAYER himself, defying physics and able to perch at least 3 fucking dozen ravens (and a few toucans) on it.]]'''. Justified, as it's magical just like the rest of his uniform. Koki Yamoto has one as well, though hers is made of ethereal fabric.