[-[[caption-width-right:320:MagicalGirl {{Ninja}}s with the tropes of ''both'' genres.]]-]

->''"300 years...try imagining how long that is, Jiyu. Every person lives through a short life. People live doing what they believe is right, so they won't have any regrets. But, sometimes a person loses themself into the flow of time. It's not easy to realize this by yourself. There are people here who haven't realized it, and have been wandering, lost for the past 300 years. Jiyu... you have the ability to save those people. You have that power. You alone have that power."''

->''"Jiyu once saved us from our dark path...but who is going to save her now?"''
-->-- '''[[TheAtoner Mikage Tsumura]]'''

300 years ago, UsefulNotes/YagyuJubei was the greatest swordsman Japan had ever seen. His feats were legendary. But eventually he started getting old, and he didn't have an heir. Despite his style of swordsmanship being the standard, nobody quite did it correctly. He didn't want his technique to be lost, so [[BeethovenWasAnAlienSpy he somehow bound it up into an eyepatch shaped like a heart]]. He sent his most trusted servant to find the one who would be able to access the eyepatch -- he would know them by their "plump bouncy bon bons." The servant, Odago Koinosuke, left on the geas that he would find the next Jubei if it took the rest of his life, [[UndyingLoyalty and beyond.]]

Unfortunately, the original Jubei's fame did not come without a price. The Yagyu family crushed all other schools of swordsmanship and slaughtered any who continued to resist. Jubei himself died in a battle with the teacher of the last school to fall, Ryujouji Daigo.

The Ryujouji clan and school swore an oath, that they would ''never'' forget what was done to them, and they and their descendants would wipe out anyone who would take up the name of Jubei. Not even death would stop this pledge.

300 years later.....

Enter Jiyu Nanohana, an OrdinaryHighSchoolStudent...yeah. She's rather happy with her widower father, Sai, and her friends at school. She even has a cute nickname, Jiyu-bei. ...say it fast and [[MeaningfulName it sounds like "Jubei."]] Isn't that funny?

This changes when she's approached by a rather strange looking guy in antique clothing, who says that she is the Chosen One, and if she would [[CallToAdventure please accept this Lovely Eyepatch]]?

And thus, she becomes Jubei-chan, the second incarnation of Yagyu Jubei! Pity there isn't any evil around. Oh, wait. The Ryujouji School has been waiting for 300 years for this little bit of payback.

Obviously, Jiyu [[RefusalOfTheCall wants nothing to do with it]]. It's a circular problem. But the Ryujoujis won't listen. Also, their grudge is so powerful that it [[TheHeartless infects their souls]]. In order to save them, Jiyu finds a way to modify the Jubei technique, and make a sword technique that cuts the hate and undeath out of their very spirits. Those cut are freed to assimilate into the modern day and forget the past.

Nevertheless, can she take on the entire Ryujouji Clan and still be Jiyu, or [[YouCantFightFate will she get caught up in the bloodshed that occured 300 years ago]]?

There is a second season, ''Jubei-chan: Revenge of the Siberian Yagyu''. In it, ''another'' dead clan, this time a splinter group of the Yagyuus, want revenge on Jubei. They are overshadowed, however, by another Jubei-chan! This one, Freesia Yagyu, is the biological daughter of Yagyuu Jubei, preserved for 300 years by being [[HumanPopsicle frozen in a glacier]]. She's very upset that her father's inheritance has gone to another girl -- and she wants it back. She becomes simultaneously Jiyu's [[StepfordSmiler manipulative best friend]] and Jubei-chan's [[EvilCounterpart worst enemy]]; she knows who Jiyu is. Jiyu doesn't know who she is. The second season has, arguably, some of the greatest sword battles in all of anime.


* AntiClimacticUnmasking: In the second season, Mikage pulls the face mask off of a mysterious antagonist, revealing nothing, since Freesia [[GlamOfShazam ages up]] when transformed.
* ArcWords: "Nisemono" from the second series, translated as either "imposter"[[note]]Freesia's term for Jubei-chan[[/note]] or "fake". The importance starts to appear in the episode "Peaceful in a Fake Family", where it becomes clear that Jiyu, Freesia, Mikage, and Sai are all hiding secrets from each other while trying to be a surrogate family. Later still, [[spoiler:Freesia manages to provoke Sai into slapping Jiyu by claiming that she said her father's work was fake. When Jiyu eventually recovers from the HeroicBSOD provoked by this, she shows her character development by declaring that both she ''and'' Freesia are truly the successors of Yagyu Jubei -- so neither of them is an imposter.]]
* ArtShift: Used continuously, and even for dramatic purposes -- e.g. when the PluckyComicRelief gets serious. In the second season each leading member of the Siberian Yagyu Clan is animated in a different style -- one is in the show's normal style, one ConspicuousCG, one's drawn SuperDeformed using ThickLineAnimation, etc.
** This gets lampshaded by characters who the victims of an art shift to crude line drawings during a single scene, by virtue of the plot moving away from them.
* BadAssNormal: Shiro in the first series, Oozaru and Kozaru in the second series.
* BecomingTheMask: In the second season, [[spoiler:Freesia's character development revolves around this, as she finds herself enjoying the role she adopts in the life of Jiyu and her friends.]]
* BareHandedBladeBlock: The Mutodori; something the Yagyu family historically is credited to; is featured in the climax of the second season.
* BerserkButton: Freesia doesn't like it when Jiyu's called "Yagyu Jubei".
* BigBadFriend: Freesia is very close to Jiyu as she plots to destroy her.
* CallToAdventure: Subverted. Jiyu ''hates'' having the eyepatch and tries to throw it away every chance she gets. Koinosuke often has to fish it out of the garbage. Somehow he ''[[TheCallKnowsWhereYouLive always]]'' manages to find it.)
* CantCatchUp: Lampshaded, in the second season, first season big bad [[spoiler: Shiro]] confidently states that he who fought Yagyu Jubei as an equal in the first season will surely be able to at least be a challenge to this new enemy, only to be defeated instantly when he tries.
* ConspicuousCG: Only one character really. [[spoiler:Someone more important than he seems.]]
* DarkMagicalGirl: Freesia
* DefeatMeansFriendship: Justified; Jiyu is cutting apart the grudge against Yagyu Jubei, which is the only reason why they attack her in the first place. They are quite grateful for it.
* DeliberatelyCuteChild: Freesia
* {{Delinquents}}: Parodied-- Bantarou and the Unrefined Trio.
* DemotedToExtra: Bantaro and Shiro in the second series; [[LampshadeHanging they're painfully aware of this]].
* DisappearsIntoLight: Any spirit that lets go of their obsession without being cut by Jiyu. [[spoiler: Koinosuke in the first season, most of the Siberian Yagyu clan except for Nizaemon and Kita.]]
** [[SchrodingersCast Doesn't happen to Koinosuke in the manga, because he was holding the BigBad down for Jiyu to stab them both, which resurrected him.]]
* ExpressiveShirt: Bantaro's shirt, which displays ''kanji'' related to whatever his current mood or train of thought might be. Such as "idiot," "reckless" or "breasts."
* ExtrudedBookProduct: Jiyu's father Sai makes a living ghost-writing JidaiGeki Samurai novels. In the second series, Jiyu asks him to stretch by writing a romance novel under his own name, which causes tension when he has to hide the fact he's doing another ghostwriting job on the side.
* EyepatchOfPower: The Lovely Eyepatches, of course.
* FreefallFight: Happens in the second series between Freesia, Mikage, and Jiyu.
* FriendToAllLivingThings: [[spoiler: Freesia]]
* FusionDance: [[spoiler:Freesia and Jiyu fuse together in the last episode using the PowerofFriendship, which somehow either turns them into or summons the Original 300-years-dead Yagyu Jubei. (The initial result was just a fused successor, given the boobs; Jiyu and Freesia are left on the ground, untransformed, once the original Jubei appears.)]]
* GagBoobs: By Yagyu Jubei's own words, ''this'' is a defining trait to find his successor. Appearance-wise, Jiyu's fairly tame by modern standards.
* HealingShiv: Jiyu's sword actually brings back the dead in addition to freeing their souls from their hatred. Most MagicalGirl shows dealing with purifying MonstersOfTheWeek give their heroine a magical wand that shoots sparkles and StockFootage. Jubei [[WhenAllYouHaveIsAHammer just has a katana]]. Same results, hilarious visuals as the target very plainly gets cut down.
* TheHeartless: The lost souls of the Ryujoji and Kita-Yagyu clans.
* HeroicBSOD: Freesia ''really'' does a number on Jiyu's sense of reality.
** Jiyu's subsequent rejection of Ayunosuke causes [[spoiler: her to turn into a tree.]]
* HeroicRROD: If Jiyu wears the eyepatch too long or fights too hard, she begins to fall into a magical fever that can't be cured normally.
* HumanPopsicle
* IOweYouMyLife: Mikage and her husband, towards Jiyu.
* JidaiGeki: Subverted.
* {{Kawaiiko}}: Subverted. Freesia acts this way to fit into society.
* KidSamurai
* MagicalGirl
* MeaningfulName:
** Not only does "Jiyu-bei" shorten to "Jubei", but Jiyu's name herself is a Japanese word meaning "Spiritual Freedom." IE, what she gives to the lost souls.
** It's also worth noting that Jiyu's mother was named "Makoto," which can be translated to "Truth," particularly since in Season Two, Freesia's mother is named "Trusia," furthering the parallel between both Yagyu descendants.
* MetaGuy: Bantarou, Shiro, Oozaru, and Kozaru in the second series.
* MoodWhiplash
* MyGreatestFailure: [[spoiler:Sai stayed at work -- as his boss demanded -- while Jiyu's mother was dying, and only made it back when it was too late.]]
* {{Ninja}}: Note, despite the English [[MarketBasedTitle Market Based Subtitle]] of "Ninja Girl", Jubei isn't; she's a "Swordswoman". The only character who is referred to as a "Ninja" would be Mikage[[note]]And that guy with the MickeyMouse hair and his minions from the first season, but who cares about them[[/note]].
* ObfuscatingStupidity: Freesia Yagyuu only ''acts'' like a cheerful hick.
* TheOjou: Subverted. She and her GirlPosse are the YuppieCouple of this series.
* ParentalAbandonment: Subverted. Jiyu's father, Sai, goes PapaWolf and insists on being involved once he finds out what's going on.
* {{Samurai}}
* PluckyComicRelief: Oozaru and Kozaru, Bantarou's sidekicks.
* RefusalOfTheCall: Subverted. Not only is this one of Jiyu's defining traits, but this, along with being MessianicArchetype, turns out to be the key to her victory. Even so, she does have to accept the [[CallToAdventure Call]] to escape it.
* ReplacementGoldfish: Sai and Jiyu's relationships with Mikage, a {{Ninja}} who [[HeelFaceTurn was]] the EvilTwin of Jiyu's dead mother.
* RousseauWasRight
* RunningGag:
** Maro trying to take Jiyu and Sachi out to a dessert shop in town, only to be foiled by either Jiyu's other life interfering or by the store being closed for no apparent reason.
** Sai immediately shooting Bantarou or Shiro down if they try calling him "Papa", "Dad", "Otousan", or anything similar.
* ShoutOut: In season one, one of Jiyu's challengers is a crayon scribble named [[Anime/TenchiMuyo Tenchi Muyonosuke]]. Also a TakeThat: Tenchi is short, ugly, with a nose that constantly drips snot and thick glasses, a voice like nails scraping across a blackboard, all the charming personality of a rabid wolverine, and is drawn in the style of a child's scrawl.
* SteppingStonesInTheSky: More like stepping logs, but who's counting.
* StockFootage: The transformation sequences. Played straight in the first season, averted in the second.
* TalkingAnimal: A whole forest of them with who Freesia lives after thawing out and before leaving on her quest.
* TakeThat: In addition to "Anime/{{Tenchi Muyo}}nosuke" mentioned earlier, Sai briefly has an ImagineSpot of a gratuitous ''Manga/LoveHina'' knockoff HaremComedy during a bout of writers' block in the second season. (He swiftly rejects the idea.)
* TrainingFromHell: Parodied in the first series. Koinosuke decides that Jiyu needs to learn how to function with one eye when she's in Jubei-chan mode, and so locks her in a one-eyed helmet that looks horrifyingly like a pink urinal. HilarityEnsues.
* TraitorShot: About a third of Freesia's scenes when she's near Jiyu or Sai.
* TransformationSequence
* TwinSwitch: In the first series, it's revealed that [[spoiler:Shirou and his twin brother Hajime traded identities; the Shirou the audience knew [[IJustWantToBeNormal Just Wanted To Be Normal]], while Hajime thought being the heir to the Ryujouji clan would be fun. This fact gets used to set up a YourPrincessIsInAnotherCastle moment.]]
* UndyingLoyalty: Koinosuke didn't let death stop his mission for the original Jubei, even for 300 years. His child Ayunosuke carries on the tradition in the second series.
* VerbalTic: Parodied in the second series: Oozaru and Kozaru deliberately start using "-zaru" -- "-Monkey" -- at the end of their sentences, hoping it'll catch on.
** GratuitousEnglish: In one scene, they try to redo their tic in Gratuitous English to appeal to the foreign anime fanbase. "Monkey Morning!" "Little Monkey Morning!"
* YouCantFightFate: Subverted.