[[quoteright:330:http://static.tvtropes.org/pmwiki/pub/images/bikini_zombie_slayers.jpg]]
[[caption-width-right:330:All this, ''and'' you get to fight zombies!]]

%% This is the initial write-up. Having only played the U.S. Wii version, original editor cannot create a decent plot summary. Please add more to this description, and then delete this comment. Thank you.

''Onechanbara'' is a series of third-person hack-and-slash games developed by Tamsoft, originally appearing as part of a budget game line released only in Japan and, yes, Europe. The games involve a team of sisters, Aya and Saki, who are among the few survivors of a zombie outbreak. Complicating matters, both sisters suffer from a curse known as "Baneful Blood", which drives them crazy when they come in contact with the zombies' blood. They have vowed to use everything in their power to drive back the zombies so that they can once again live in peace.

Two games from the series have been released in the United States: ''Onechanbara: Bikini Samurai Squad'' (for {{Xbox360}}) and ''Onechanbara: Bikini Zombie Slayers'' (for the {{Wii}}). There's also a live-action movie based on the game series.

A new game called ''Onechanbara Z: Kagura'' was released on 1/19/2012, in Japan for {{Xbox360}}. Instead of Aya and Saki in this game, we have Kagura and Saaya: a pair of vampire sisters.
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!! The ''Onechanbara'' games use the following tropes:
* ActionCommands: Onechanbara Z: Kagura uses this for finishers and a new system called blood recovery. Blood recovery is when you can come back from dying by drawing in your own blood. This will make you very powerful, but the draw back is that you are more [[GlassCannon susceptible to damage]]
* ActionGirl: Every female character!
* AndYourRewardIsClothes
* BadassAdorable: Saki.
* BadassBiker: Ada.
* BadassLongHair: Saki, Ada and Misery.
* BeautyIsNeverTarnished: Averted.
* BittersweetEnding: Happens in almost every game in the series.
** Onechanbara 2 ends up with [[spoiler: [[BigBad Eva]] being killed and EATEN by Reiko which makes a FaceHeelTurn.]]
** In Bikini Samurai Squad [[spoiler: Himiko is killed, but Annna's brother David dies and it is hinted that Saki may lose control over herself in future]].
* ChainsawGood: Saaya.
* CuteBruiser: Saki.
* DeadlyUpgrade: The "Baneful Blood" curse induces a [[UnstoppableRage rage-like state]] when they come in contact with zombie blood. It greatly increases their strength and agility, but slowly burns away at their life force until they die. Under certain conditions, a second, more powerful rage state can be induced.
* DefeatMeansPlayable: In ''Bikini Zombie Slayers'', you have to win the end boss battles against Reiko and Misery (i.e. complete Story Mode as Aya and Saki, respectively) to unlock them as playable characters.
* DiedInYourArmsTonight: [[spoiler:David]].
* DualWielding: Aya and Kagura's twin swords and Reiko and Anna's SwordAndGun combo.
* EssenceDrop
* ExcusePlot: Scantily clad young women slice up thousands of zombies, spilling gallons of blood and LudicrousGibs in the process. What did you expect? If you answer "a deep plot with complex characters", you're a big, fat, liar.
* ExpendableClone: Reiko; all those encountered so far are merely eyes and ears (and lab rats) of her real self that is wired into a supercomputer somewhere far away.
* {{Expy}}: In Bikini Samurai Squad there are zombies that look nearly like [[VideoGame/StreetFighterIII Hugo Andore]]
* ExactlyWhatItSaysOnTheTin: the subtitles
* FaceHeelTurn: [[spoiler:Reiko]] in ''Zombie Hunters 2''.
* FanService: how else to explain their attire.
* FiveManBand: An all-female team formed [[spoiler: and disbanded]] in Onechanbara Special.
** TheHero: Aya
** TheLancer: Misery
** TheSmartGuy: Reiko
** TheBigGuy: Saki
** TheHeart: Annna
* FluffyFashionFeathers: Aya's outfit has the bikini and feather boa. Kagura's outfit is very similar.
* FurBikini: Since feather-trimmed ones count.
* GratuitousEnglish: Kagura sure loves some {{Engrish}}.
* GunsAkimbo: Annna
* HeelFaceTurn: Saki
* HighPressureBlood
* {{Joshikousei}}: Saki
* KarmicDeath: [[spoiler:Eva]]
* KatanasAreJustBetter: Aya's weapon of choice.
* MultiMookMelee: Survival Mode.
* MyNaymeIs: Annna.
* OurVampiresAreDifferent: Kagura and Saaya seem to do perfect fighting in the [[WeakenedByTheLight sunlight]]. The trailers explain they're {{Dhampyr}} born from a union of a vampire and women who had Baneful Blood.
** Also a case of OurZombiesAreDifferent - Reiko in her story arc within Bikini Zombie Slayers mentions that most zombies encountered during the outbreaks are in fact not former humans (although contact with zombie bodily fluids can still cause zombification) but made of the very stuff of Earth itself, leading her to wonder if the zombie crisis is merely nature's revenge against the greed of humans.
* {{Portmantitle}}: The title, 'Onechanbara', is a portmanteau of 'onē-chan', an affectionate [[JapaneseHonorifics Japanese term of address]] for an older sister or a young woman, and 'chanbara', a word referring to the genre of samurai films, particularly the classic ones (much like Wild West films over here in the West). [[hottip:*:Note that for the pun to be retained in romanization, one has to use modified Hepburn (or another romanization scheme like Nihonsiki - indeed, since these romanization schemes tend to drop the hyphen used for honorifics like 'Onē-chan', this might be better anyway) rather than traditional Hepburn, which romanizes the kana ん / ン as 'm' rather than 'n' before an m, b or p (since that's closer to how it's actual pronounced).]]
* PsychoForHire: Reiko and Misery.
* SexyPackaging
* SexyWalk: Aya especially.
* SiblingTeam: Aya and Saki.
* {{Stripperiffic}}:Most of the female characters, but mainly Aya.
* SuspiciouslySimilarSubstitute: Kagura & Saaya to Aya & Saki; but more so Kagura because she wears an outfit similar to [[http://andriasang.com/comy2j/images/23esn/ Aya]] and carries twins swords. Though Kagura seems to have a cockier attitude compared to Aya going by the first trailer.
* SwipeYourBladeOff: A necessary tactic, as blood accumulates on your weapons quickly as you slice through the zombie hordes, and getting too much blood on it will cause them to get stuck.
* SwordAndGun: Reiko can switch between a regular sword and either a shotgun or SMG.
* TimeAbyss: Himiko is 300 years old ''human''.
* VampiresAreRich: The main villains look like they're of nobility in Onechanbara Z: Kagura.
** They are the ruling cadre of the vampire clan [[spoiler:that raised Kagura & Saaya and sent the pair to fight the new zombie crisis...... until they proceed to double-cross the heroines mid-story. The new crisis is in fact their doing as well, aimed at luring out and killing the most dangerous descendants of the Baneful Blood (Aya and Saki). When they find the heroines in the middle of a duel with Aya and Saki, they decide that the dhampyr sisters, also carriers of the Baneful Blood, have outlived their usefulness as well]].
* VirtualPaperDoll: ''Bikini Samurai Squad'' allows you to customize the appearance of your characters.
* WhipSword: Eva's weapon which is later used by Misery. Kagura uses a rope dart-like variant consisting of two knives with long ribbons tied to the handles.
* ZettaiRyouiki
* ZombieApocalypse
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