[[quoteright:334:http://static.tvtropes.org/pmwiki/pub/images/kekkaishicovervol1ss8x.jpg]]

''Kekkaishi'' is an anime and manga series centering around 14-year-old Yoshimori Sumimura and his 16-year-old neighbor/childhood friend/"partner" Tokine Yukimura. During the day, they are just [[OrdinaryHighSchoolStudent ordinary]] (if slightly sleep-deprived) high school students, while at night they defend their homes and school grounds from monsters [[OurMonstersAreDifferent (Ayakashi)]] by conjuring [[FunctionalMagic multi-use barriers (Kekkai)]]. They're eventually joined by the half-ayakashi [[PowerTrio Gen Shishio]], and much later by Souji Hiura, a rather odd young man in his own right.

The story is not just as simple as that, however, as the protagonists find themselves and their protectorate involved in the devious plots of evil societies and megalomaniacs whose desires reach farther than mere destruction.

In America, the anime premiered in May 2010 on Creator/AdultSwim (with English dubbing) and on {{Creator/Hulu}} in early 2011 (in Japanese with English subtitles). The manga concluded in 2011. Yoshimori, Tokine and friends appear in the MassiveMultiplayerCrossover game, VideoGame/SundayVSMagazineShuuketsuChoujouDaikessen. The anime is currently streaming on Creator/NeonAlley.

The author of Kekkaishi, Ierou Tanabe, has a new monthly series out, called {{Manga/BirdMen}}.

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!!''Kekkaishi'' provides examples of:

* AbsoluteCleavage: Shion.
* ActionMom: Yoshimori's mother, Sumiko.
* AccidentalPervert: Yoshimori has one memorable moment in the manga. Luckily for him, he isn't caught. ''Un''luckily for him, his conscience gives him no end of grief over it.
* AlienGeometries: The Castle of Karasumori. It's MUCH bigger on the inside, among other problems. The Kokuboro castle seems to fit this too, though since it was created by a rather capricious and unpredictable {{kitsune}}, it's not surprising.
* AllOfTheOtherReindeer: Poor Gen.
* AloofBigBrother: Masamori acts nice to Yoshimori around others, but once behind closed doors he is down to business.
* AlphaBitch: Mao.
* AlwaysChaoticEvil: Averted. While the Karasumori grounds ''do'' mess with ghosts' heads, they still have the capacity to listen to reason. Or at least to the person about to kill them.
* AntiHero: Child Yoshimori is a Type I. Gen is a very obvious Type III. Masamori is a subtle Type III, with a little bit of Type IV thrown in.
* ArmorPiercingSlap: Tokine on Yoshimori, for putting so many people in danger by forcing them to [[spoiler:rescue him from Kokuburo Castle.]] Even Masamori was impressed.
* AsleepInClass: Yoshimori has monster-fighting duties every night, so he sleeps in class (and naps on the roof during breaks) practically every day.
* TheAtoner: Hazama Tokimori.
* AwesomeByAnalysis: Mamezou.
* AxCrazy: Kaguro. Made even worse by the fact that he can sprout a limitless supply of swords from his body, making it impossible to disarm him.
* {{Badass}}
** Gen
** Yoshimori's mom, Sumiko. Part of her back-story shows her killing a Land God for amusement's sake, and the next time we see her, she [[CurbStompBattle curbstomps]] an extremely powerful elemental Dragon.
** With proper focus, Yoshimori is capable of really awesome stuff.
* BarrierWarrior: Kekkai
* BattleAura: Yoshimori's initial attempts at Zekkai.
* BattleCouple: Yoshimori and Tokine always go on patrol together. He has a crush on her but while she's normally cold there are [[ShipTease moments to hint otherwise.]]
* {{Bifauxnen}}: Kakeru in flashbacks (she's even mistaken for a boy at least once.)
* BigBad: Byaku or Hime for the Kokuboro arc; later arcs have no shortage of potentials, either.
* BigEater: Uro-sama loves [[TrademarkFavoriteFood donuts]] and stacks them on his extendable fingers.
** [[spoiler:The Gazer]] is nigh PacMan gone wrong. [[http://www.mangareader.net/kekkaishi/338/5 Seriously.]] [[http://www.mangareader.net/kekkaishi/338/14 This is not a stretched interpretation.]]
* BigFancyHouse: The Sumimuras ''and'' the Yukimuras; [[LampshadeHanging lampshaded]] in a DayInTheLimelight.
* [[spoiler: BittersweetEnding: The Urukai is reformed under Masamori, Karasumori is permanently sealed away, Shichirou becomes the new head of the Ougi clan, the Sumimura and Yukimura houses are freed of their duties and have overcome their rivalry, and Sousui and Yumeji have been dealt with. However, Yoshimori's mother sealed herself in with Karasumori to keep the seal permanent.]]
* {{Bishounen}}
* BishounenLine: While not exactly {{Bishounen}}, most ayakashi become more humanoid the stronger they get. This is explained as [[PinocchioSyndrome most ayakashi wanting to be human]]
* BlackAndGreyMorality: The leaders on both sides of the main conflict are very nasty. It's just a decision between which flavor of nastiness you prefer. The main cast are pretty much straight-up good guys.
* BloodKnight: Kaguro.
* BlowYouAway: One of the Ougi Clan's abilities.
* BodyHorror: That big guy in the Council of Twelve with a bag over his head? Yeah, there's a pretty good reason for that. [[spoiler: He's a man-shaped lump of flesh consisting of himself and four of his brothers fused together.]]
* BreakingSpeech: Masamori gets a devastating one from Mudou.
** Mudou gives one to Yoshimori and Masamori in his first appearance. He then builds on it by offering Masamori a SadisticChoice - save his own life or his brother's - and it's extremely effective in context.
** Kaguro gives a couple to Gen, and later deconstructs [[MadScientist Aihi]]'s psyche when he decides to kill her [[ForTheEvulz for his own amusement]].
* BreastExpansion: For one hilarious page, courtesy of a happy ''tengu''. [[DudeLooksLikeALady Sen]] was not amused.
* CallingYourAttacks: Necessary for Kekkaishi techniques, although at least they only consist of one word.
* ChekhovsGun:
** In the manga, Yoshimori collects a bunch of Kouya's hair after his death, and gives it to Masamori for proper burial on the dog's home mountain. Much later on, we learn that Masamori has resurrected Kouya using this hair. Later still, we learn that he did something similar to Mudou.
** It's brief, but it gets mentioned a couple of times that humans have turned into ayakashi in the past. It's implied that Gen's family's brutal martial arts tradition may have created his ayakashi side.
* CherryBlossoms: There's a sakura tree on the Karasumori school grounds that blooms sporadically out of season. Ayakashi seem to enjoy it a lot.
* CheshireCatGrin: Sumiko.
** And so do Madarao and Hakubi.
* ChivalrousPervert: Hakubi, who shamelessly flirts with Tokine and every other attractive female he sees.
* TheComplainerIsAlwaysWrong: Yoshimori, mostly at the early chapters/episodes. It's much more noticeable in the English version.
* ConspicuousCG: For the most part, Kekkaishi is an example of the ''right'' way to mix computer graphics and hand-drawn animation. The barriers and InstantRunes are done so well that you could watch the whole series without realizing how they were done. But then you see a car moving and it all goes to hell. Automobile animation is still the kryptonite of CG.
* CoolBigSis: Tokine plays this role to Yoshimori in flashbacks and the beginning of the series proper.
* CoolOldLady: Tokiko isn't incredibly friendly, but she's mentored Yoshimori just about as well as his own granddad.
* CovertPervert: Sen and Shuu.
* ADayInTheLimelight: Heisuke Matsudo and Risa (Lisa) Kagami and their big battle.
** Kekkaishi really seems to love this trope. Everybody from [[NonHumanSidekick Madarao]] to the teachers at Yoshi's school get in on the act at some point.
* BlingBlingBang: Heisuke Matsudo produces an ornately-decorated flintlock pistol when attempting to defend himself from Shion's attack.
* DeadAllAlong: As of Chapter 316 it's revealed that [[spoiler:Tokimori]] is only in a semi-physical state and is sticking around only because [[spoiler:of a feeling of obligation to the Lord of Karasumori, his son.]]
** [[spoiler: Yumeji and Sousui.]]
* DeadpanSnarker: Madarao and Hakubi rarely pass up an opportunity to take cynical jabs at Yoshimori when he screws up. If it's not him, they're probably sniping at each other.
* DealWithTheDevil: Heisuke
* DeclarationOfProtection: Yoshimori has sworn to protect Tokine no matter what, and it's his main motivation for getting stronger - he doesn't really care about the whole 'true successor' or 'rival houses' deal. Of course, Tokine is generally quite capable of looking after herself, making this example a Type I. His main reason (other than the romantic implications) is that she got hurt protecting him when he screwed up an Ayakashi-hunt as a kid. (Making it a Type VII as well.)
* DeflectorShields: Of the personal variety.
* DefusingTheTykebomb: Yoshimori attempts to do this to Hiura.
* {{Determinator}}: Lampshaded.
* DisproportionateRetribution: The Princess finds a seed in the grapes she was eating. Byaku responds by saying that he will make sure it doesn't happen again. And that whoever prepared the fruit will be thrown into the abyss, ''never to return''.
* DroppedABridgeOnHim: [[spoiler: Gen.]]
* DudeLooksLikeALady: Kagemiya Sen.
** Also Lord Tan'Yuu in the shrine where Masamori kills Mudou.
* [[EekAMouse Eek A Cockroach]]: Tokine can't stand them. She even goes so far as to call them "dark creatures," and if she ever runs into one, she ''will'' make [[HilarityEnsues hilarity ensue.]]
** Tokiko shows it runs in the family.
* EleventhHourSuperpower: Yoshimori pulls this off often, such as unleashing a [[spoiler: MASSIVE Zekkai to kill Kaguro]], and also [[spoiler: unlocking the ultimate [[SuperMode Musou State]] to save Karasumori from Yumeji's minions]]. Deconstructed when he tried to invoke this deliberately when the school was being swarmed by ayakashi butterflies. His solution was to create a massive kekkai and try to Metsu and destroy only the butterflies and nothing else. When Tokiko correctly [[WhatTheHellHero points out]] that he has no idea how to do this, he out right says [[HeroicSecondWind "You don't know what you can do until you try"]]. Tokiko had to [[SadisticChoice create a clone of Tokine and challenge him to destroy the fake and not the real one, with the same kekkai]], to get him to come to his senses.
* EvilMakesYouMonstrous: Kaguro.
* EvilPlan: In the first arc it was the Kokobouro trying to take over Karasumori.
* EvilVersusEvil: [[spoiler:Yumeji]] is partaking in Shinyuuchi-hunting and attempting to destroy Karasumori. [[spoiler:Sousui]] is murdering Urakai members one by one, even the good-ish ones like [[spoiler:Okuni]].
** A fair amount of infighting occurs among the senior members of the Kokuboro as the organization (and the castle they operate from) literally falls apart. Most notably Kaguro vs. Aihi.
* EvenEvilHasStandards: Kaguro doesn't take kindly to people taking women hostage during fights.
* {{Expy}}: The true form of demonic swordsman Kaguro is a really obvious homage to [[RurouniKenshin Shishio Makoto]], with whom he also shares obsession with drawing out the true power of the protagonist, just to provide himself with an interesting opponent.
** Grandfather Sumimura looks incredibly similar to [[VideoGame/MegaMan Dr. Wily]] as well as [[{{Tekken}} Heihachi Mishima]] (albeit an obviously less buff version of the latter).
* ExtremeDoormat: [[BigBad Byaku]], turns out to be this, always acting to fulfill the desires of other people because he cannot figure out his own.
* EyesAlwaysShut: Shuu.
* FaceDeathWithDignity: After being fatally wounded by Kaguro, [[spoiler: Gen]] is finally able to find peace and dies with a serene smile on his face.
** [[spoiler: Princess and Byaku]] also meet their end this way as Kokuboro dissolves around them.
* FaceFault: Tokine does this ''a lot'', as do the two ghost dogs. The manner in which their faces reset afterwards changes throughout the anime series.
* FacePlant: Happens to Yoshimori in an early episode of the anime when Tokine trips him using a small kekkai.
* TheFaceless
** The Princess, [[{{Kitsune}} a fox spirit]], during the beginning of the Kokuboro arc.
** Yoshimori's mother, Sumiko. For a long time, all we ever see of her face is her enigmatic smile.
* TheFairFolk: Ayakashi are quite similar to them in mindset, if not in form.
* {{Familiar}}: The kekkaishi "landlords".
* FamousLastWords: The pātissier ghost said "Cabbages..." before his death.
* {{Fanservice}}: [[AvertedTrope averted]] for the most part.
** [[MsFanservice Shion]] plays this completely straight however.
** Princess' robes show a fair amount of cleavage in some scenes, however.
** And for the ladies, Yoshimori's training scenes. He does them [[ShirtlessScene shirtless]] when he could easily do them with a shirt on.
* FeminineWomenCanCook: Subverted in the manga. Tokine has many talents, but cooking isn't one of them.
* FertileFeet: Lord Uro cause moss to grow on anything surface he touches and later, to make up for all the food he stole, he [[GrowsOnTrees sprouts strange plants]] for all the victims bearing as their fruit the food he took several times over.
* FeudingFamilies: Between the Yukimura and Sumimura clans, over which of them is the "true and legitimate heir" to the guardianship of Karasumori. Yoshimori and Tokine, however, think it's pointless and stupid, have no interest at all in continuing it, and show fondness for each other.
* FunctionalMagic: The Kekkaishis' ability to use [[BarrierWarrior barrier magic]] in ''very'' creative ways makes it a ridiculously awesome offensive and defensive technique. It also has practical applications off the battlefield as well, as Yoshimori demonstrates by keeping his grandfather at bay when he's trying to sleep.
* FunnyBackgroundEvent
* GenreSavvy: The first MIB who attacks Karasumori. When fighting a {{Determinator}} who relies on HeroicSecondWind, kill him ''quickly.''
* GivingSomeoneThePointerFinger: [[http://www.ourmanga.com/Kekkaishi/209/kekkaishi_22_c209-066 "Please do not point at me."]]
* GodsNeedPrayerBadly: Ayakashi who avoid humans for too long fade away.
* GoneHorriblyRight: Tokimori just wanted to gift [[spoiler:his unborn son, Lord of Karasumori]] with powers. He succeeded.
* GoodIsNotNice: '''Masamori''', although he does a good job of hiding it when he needs to. Gen is a more obvious example.
* GoodScarsEvilScars: Tokine's scar on her hand and arm is shown a lot, since the events around it had such a large impact on forming Yoshimori's personality.
* GratuitousEnglish:
** The school's English teacher even gets knocked out once for using it too much.
** Hakubi is pretty fond of calling Tokine "Honey".
* GreenLanternRing: Kekkai have [[MagicAIsMagicA simple enough rules]], but can still be used for an astonishing variety of things.
* HandsomeLech: Sen-chan has shades of this. The fact that Tokine wears [[SkirtOverSlacks shorts under her skirt]] is borderline SeriousBusiness to him.
* HealingFactor: Part of Gen's skill set. Ayakashi who don't have one can gain it via Karasumori's power.
* HeroicSacrifice: [[spoiler: Yoshimori's mom manages to seal away Karasumori away permanently, but is also sealed away forever as a result.]]
* HeroKiller: [[spoiler: Kaguro to Gen.]]
* HotScientist: Aihi in her human form.
* HotTeacher: Atora to Gen.
* HouseHusband: Yoshimori's dad, Shuji Sumimura.
* HotbloodedSideburns: A manga-specific {{Omake}} reveals that one of Yoshimori's prototype character designs had these. His "ultimate shikigami" has 'em like whoa.
* IAmYourFather: It's never revealed to the little one, but [[spoiler:Tokimori is actually the father of the child-like lord of Karasumori]].
* IAmYourOpponent: Yoshimori to Kagurou
* InvisibleToNormals: In addition to many the many beings naturally invisible to humans without supernatural perception, there's also the kekkai around Karasumori, which prevents outside observers from noticing the real world effects of nightly violent battles.
* JerkWithAHeartOfGold: Grandfather Sumimura, and just about every female technique user in the series.
** Masamori hides his heart of gold more than most, but he's the type that dirties himself to keep those he loves above the muck.
* JigsawPuzzlePlot: The plot of the manga gradually shifts into a vast and complicated power play within the Urakai. Every time a new piece falls into place, more gaps in the overall scheme of things appear.
* KilledOffForReal: [[spoiler: Poor Gen.]]
* ALadyOnEachArm: Ougi Shichirou
* LawOfConservationOfDetail: The Yagyou team appearances are a prime example. Same goes for the Council of Twelve.
* LethalChef: Tokine's attempts at baking are an absolute disaster.
* LikesOlderWomen: Yoshimori for Tokine.
* LimitedWardrobe: Practically all the characters who don't have to interact with the general human population on a daily basis suffer from this. Pretty much the only exceptions seem to be Yoshimori and Tokine, who can occasionally be seen wearing normal clothing in addition to their school and kekkaishi uniforms.
* LoadsAndLoadsOfCharacters: Oh yes.
* LoadBearingBoss: The end of the Kokuboro arc.
* LoveMakesYouEvil: Sousui did all of ''that'' for Suigetsu. His wife. He never wanted to kill her, and only wanted his memories back, and when he finally remembered everything, ''[[DrivenToSuicide he committed freaking suicide.]]''
* LuminescentBlush: Yoshimori from time to time.
* MagicAIsMagicA: Kekkai magic has some simple rules that are explained right at the beginning. Despite this, there's enough wiggle room for [[GreenLanternRing a lot of creativity]] on the part of the users.
* MagicSkirt
* ManekiNeko: In episode 48 of the anime, one of these is among the objects chucked out a window when Sen is chewing out Yoshimori.
* ManipulativeBastard:
** Masamori projects an attitude of the caring commander, devoted family member and overall nice guy, but resorts to cruel deception and ruthless extortion without blinking, when it serves his purposes.
** In many ways Sen is in training to become one. He already knows how to play Yoshimori like a fiddle.
* MarshmallowHell: Atora to Gen.
* TheMasquerade: The Kekkaishi have to hide the fact that Ayakashi visit the school every night.
* MaybeEverAfter: While the manga ends in a very sweet moment between Yoshimori and Tokine that's dripping with ShipTease, it doesn't really outright say that they're in a relationship.
* MindControl: Byaku implants ''living insects'' in his victims to MindControl them.
* MissingMom: Until Chapter 284.
* MoodWhiplash: Though thankfully, such moments are handled quite well.
* MsFanservice: Shion.
* MundaneUtility: Magically conjured barriers for exorcising demons are also handy for holding things in midair, tripping people, and keeping your obnoxious grandfather from bugging you while you're sleeping. Similarly, semi-autonomous magical constructs can be used to make a decoy in order to cut class.
* MustHaveCaffeine: Yoshimori can be seen drinking up to ''four'' coffee-milk packets in one go. It's a necessity of his TripleShifter life style.
* NamesToKnowInAnime: The seiyuu
** Creator/ArisaOgasawara: Ryou Shishio
** Eiji Miyashita: Gen Shishio
** Creator/HiroakiHirata: Kaguro
** Creator/HiroyukiYoshino: Yoshimori Sumimura
** Creator/HisaoEgawa: Yoki
** Creator/KenjiroTsuda: Byaku
** Rie Saitou: Tokine Yukimura
** Creator/YokoHonna: Risa (Lisa) Kagami
* NerdsAreSexy: Aihi's human form.
* [[NoblewomansLaugh Noblewoman's Laugh]]: Tokine, sometimes to mock Yoshimori, but occasionally to inspire him.
* NonHumanSidekick: Ghost dogs.
* TheNoseKnows: Madarao and Hakubi.
* NotQuiteFlight: Kekkaishi can use their powers to continually create midair platforms, allowing them to travel long vertical distances and engage flying enemies.
* NowWhichOneWasThatVoice
* {{Obake}}: The Ayakashi.
* OminousOwl: The shirahago turn into one. With [[NightmareFuel REALLY]] freaky looking eyes.
* OmnicidalManiac: [[spoiler: The Sousui, so very much.]]
* OneWingedAngel: Tons. Most ayakashi transform into bigger, tougher and uglier forms if they manage to stay within Karasumori's bounds long enough. Then there are ayakashi masquerading as humans, who assume their true forms in battle. Madarao enters one of these if his collar is taken off. Inverted with Yoki, who becomes smaller and more compact as he powers up, turning from a MightyGlacier to a LightningBruiser.
* {{Onmyodo}}: The Kekkaishi's shikigami.
* {{Otaku}}: Yoshimori is a cake and [[SweetTooth sweets]] otaku.
* PetTheDog: Literally, for Gen.
* PillarOfLight: Yoshimori vs Kaguro.
* PowerTattoo: Inverted, as Gen's flame-rope tattoo actually limits his power use, filling him with burning pain when he's using too much of his ayakashi side.
** Played straight with the Houin mark.
* PowerTrio: Yoshimori, Tokine, and Gen.
* PrehensileTail: All nine of Princess' tails are capable of wrapping around things; one of her frequent means of attacking an opponent is to [[CombatTentacles practically mummify them in her tails]] with only their face exposed.
* RazorWind: The Ougi Clan's standby.
* RedOniBlueOni: Yoshimori and Tokine.
** Masamori makes a good Blue Oni himself.
* RoofHopping: Bonus points go to using kekkai as hopping platforms.
* SadisticChoice: [[spoiler: Tokiko had to foist one onto Yoshimori to prevent him from probably killing everybody in the school in an attempt to save the students from a swarm of (obviously InvisibleToNormals) ayakashi butterflies.]]
* SayMyName: "YOSHIMORIIIIIIII!" "TOKINEEEEEEE!" "SHISHIOOOOO!" "[[LampshadeHanging Stop shouting]] [[TearJerker my name so much]]."
* SceneryPorn: The manga's volume covers, just to start. Yellow Tanabe is ''really'' into the architecture of traditional Japanese castle.
* SealedEvilInACan: The more we learn about what Karasumori probably is, the more sinister it seems, but ultimately subverted, though no less dangerous.
* TheSevenMysteries: More like ''seventy''-seven, due to the school being built over the anime equivalent of a [[Series/BuffyTheVampireSlayer hellmouth]].
* SexyMentor: A relatively subtle example, but in the last chapter,[[spoiler: Yoshimori is clearly trying to invoke this trope when he offers to teach Tokine how to cook when no one else is at his house. Tokine counters by offering to mentor him in math, which terrifies Yoshimori.]]
** Atora is much better example, as she [[spoiler: was this to Gen before he died.]]
* ShipperOnDeck: Madoka, Tokine's best friend, seems to be fond of the idea of Tokine getting together with Yoshimori as she finds the fact that the two are childhood friends appealing. Kyoko and Ayano support Yurina, a classmate of Yoshimori, since they think she has feelings for Yoshimori after misinterpreting the two's rooftop discussions on spirits as romantic confessions. Yoshimori's father is also apparently a [=Yoshimori/Tokine=] shipper.
* ShipTease: Tons between Yoshimori and Tokine. And Byaku and the Princess, of all people.
** Also some subtle, subtle hinting between Masamori and Kasuga Yomi.
* {{Shonen}}: Yoshimori is 14. He wants to get stronger so he can protect Tokine. And he does.
* ShoutOut: Kouya and Madarao give us a shoutout to ''Manga/FullmetalAlchemist'', or more precisely, Edward Elric's BerserkButton when Madarao calls Yoshimori "Shorty."
** This comes up again in Episode 25, where Tokine (like Winry) claims she likes taller boys and Yoshimori immediately goes BlueWithShock for several minutes. Doubles as an ActorAllusion in the dub.
* ShutUpHannibal: Yoshimori does this to Kaguro, but Kaguro doesn't really seem to mind.
* SittingOnTheRoof: Yoshimori practically lives on the school roof. Well, sleeps there, anyway.
* SkirtOverSlacks: Tokine.
* SlasherSmile: Kaguro has one plastered on his face on a near constant basis.
** Yosimori gets a humorous variant now and then when planning out a particularly ambitious [[SweetTooth cake castle]].
* SphereOfDestruction: Masamori's Zekkai.
* SpitTake: Yoshi, pretty spectacularly, when Masamori asks him if he still likes Tokine.
* SpoilerOpening: [[spoiler: Gen]] shows up in the anime's OP.
* StandingInTheHall: Yoshimori has to do this in one episode, but cheats by putting the bucket atop an invisible kekkai. Silly kekkaishi, that never works!
* StarCrossedLovers: While the whole "coming from rival familes" thing fits Yoshimori and Tokine, the trope grand prize goes to Tokimori Hazama's affair with [[spoiler:the Princess of Karasumori, who he was hired to protect.]]
* TheStoic: Byaku practically never shows any emotion, even in the heat of an intense battle.
* SupernaturalSensitivity: The Sumimura and Yukimura kekkaishi have the ability to sense when an Ayakashi enters the Karasumori site.
* SweetTooth: Yoshimori.
* ThemeNaming: All of the males who were born into the Sumimura family have given names ending with -mori. All of the females born to the Yukimura family have given names that begin with Toki-. Both apparently derived from the founder of the Karasumori Kekkaishi, Hazama Tokimori.
* TheThingThatGoesDoink: A shishi-odoshi is shown several times at Urakai headquarters and in both the Sumimura and Yukimura family gardens.
* ThoseTwoGuys: Tabata and Ichigaya, Yoshi's buddies at school.
* TrademarkFavoriteFood: Yoshimori loves his coffee-flavoured milk. Uro-sama has a thing for donuts.
* TrainingMontage: Used multiple times for interplay of drama and humor.
* TripleShifter: Yoshi's School, Home and Kekkaishi duties. As a consequence, he bunks classes to go [[SittingOnTheRoof sleep on the roof]] and is addicted to [[MustHaveCaffeine coffee-milk]]
* TrueCompanions: Yoshimori, Tokine and Gen. Also, the Yagyou team.
* {{Tsundere}}: Tokine, very mildly. Yoshi's got a few of the traits himself.
* {{Tykebomb}}: Hiura appears to be one of these.
* UnluckyChildhoodFriend: Jury's out until the end, but it looks like it's getting [[SubvertedTrope subverted]].
* UnskilledButStrong: Yoshimori, though he is improving.
* VerbalTic: Ohkigiburuma, otherwise known as the kyo-kyo-kyo-KYO-KYO-KYO-KYOOOOOOOO monster.
* WakeUpGoToSchoolSaveTheWorld: Somehow, Tokine still manages to get good grades. Yoshimori, not so much.
* WalkingWasteland: [[spoiler:Chushinmaru, Lord of Karasumori, wiped out whole towns and forests due to his uncontrollable power to drain life-force. That, as much as his power to strengthen Ayakashi, is why he was sealed.]]
* WeakButSkilled: Tokine's lack of strength is made up for by her precision, as noted by Tokiko when she tried Masamori's multi-kekkai technique.
* WeirdnessMagnet: Karasamori's lord attracts Ayakashi wherever he goes.
* WeHaveReserves: Masamori is disgusted when the rest of the Urakai leadership show casual, callous disdain about the rank and file. They explicitly state that their men are of no consequence, and that as long as the leadership survives the Urakai will live.
* WhackAMonster: Yoshimori and Tokine end up fighting a mole-like Ayakashi in episode 10 of the anime, Yoshimori at one point even trying in vain to smack it with his weapon as it repeatedly pops up out of multiple holes.
* WhamEpisode: Admit it [[spoiler: the death of Gen]] was not expected
* WhatMeasureIsANonHuman: Our heroes will let all kinds of supernatural critters live, as long as they don't come to power up and wreak havoc. As soon as they become a threat, however, they're killed without hesitation. [[JustifiedTrope Justified]] by the fact that even if an Ayakashi has a good reason for wanting to gain power from Karasumori, [[TheDarkSideWillMakeYouForget the power itself makes them more evil and out of control]].
* TheWorfEffect: Gen Shishio gets his ass handed to him by the Kokuboro when they all show up.
* TheWormThatWalks: Byaku.
* YamatoNadeshiko: Tokine, especially the 'iron core' part. Her classmates see her as noble and pure and call her 'The Florence Nightengale of our age'. [[LadyOfWar She's really a scarily competent and rather ruthless]] ActionGirl. However, she does perform tea ceremonies with her grandmother in traditional clothing.
* {{Youkai}}: The Ayakashi, which are any monster, ghost, spirit, or demon. These can be broken down into:
** {{Obake}}: Living shapeshifters.
** [[AnimateInanimateObject Tsukumogami]]: Possessed household objects.
** RedOniBlueOni: Although they tend to become red oni, thanks to Karasumori making spirits get drunk with power.
** [[OurGhostsAreDifferent Ghosts]]: The Patissier ghost arc.
** {{Kitsune}}: The entire Kokuboro arc.
** [[HaveYouSeenMyGod Gods]] and [[OurDemonsAreDifferent Demons]]: It's hard to draw the line, really.
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