Katte ni Kaizou

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Alternative Titles

Synonyms: Katteni Kaizou
Japanese: かってに改蔵


Type: OVA
Episodes: 6
Status: Finished Airing
Aired: May 23, 2011 to Oct 26, 2011
Producers: None found, add some
Licensors: None found, add some
Studios: Shaft
Source: Manga
Genres: ComedyComedy, ParodyParody, SchoolSchool, Sci-FiSci-Fi, ShounenShounen
Duration: 23 min. per ep.
Rating: R+ - Mild Nudity


Score: 6.901 (scored by 88838,883 users)
1 indicates a weighted score.
Ranked: #41312
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #3340
Members: 27,503
Favorites: 31

External Links

Ranked #4131Popularity #3340Members 27,503
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Episodes: /6
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Katsu Kaizou is a very gullible, 17-year-old high school student and a believer in science fiction, aliens, ghosts, UFOs, conspiracies, etc. He thinks that everything going on around him is the result of some sort of alien plot to take over the world. Each story is pretty much self-contained and is completely bizarre. Kaizou joins the school's science club, makes new friends, and ends up coming in contact with all sorts of strange things like log people, deadly sushi, pee-blades, scary infections, robot invasions, ghosts, living dolls, and more!


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Related Anime

Characters & Voice Actors


Shintani, Ryouko


Tachiki, Fumihiko


Ishida, Akira


Takaoka, Binbin


Nagata, Yoriko


Ooshima, Miku
Assistant Producer
Shinbou, Akiyuki


Opening Theme

"Katte ni Kaizou Shitemo Iize (かってに改造してもいいぜ)" by Ichirou Mizuki & Tokusatsu (水木一郎と特撮)

Ending Theme

"Nani ga Nani de Nani nano... (ナニがナニでナニなの・・・)" by Ryoko Shintani (新☆谷良子)

Aug 30, 2013
Hironono (All reviews)
This by far is one of the most unique anime out there. I mean everything is unique, the storyline, the characters, even the animation! This anime can be greatly appreciated by comedy lovers and users who have a passion for let's say 'crazed' storylines. But be warned, most of the comedy in this one are 'dirty', in other words related to sex, and are just weird. Compared to other comedy/gag anime out there this has to be the best.

Now let's take a deeper look at the sound and animation since we identified most of the other areas. I would give the sound a 9/10, since read more
Jul 7, 2012
halfshadows (All reviews)
This series is well written, has good artwork, good animation, good characters, and a decent soundtrack. So why only a 7? The reason it's so good, and the reason it's not a 10 is the same: it's a prototype for Sayonara Zetsubou Sensei.

It's pretty simple really. The characters look, sound, and act like the characters in SZS. The animation, soundtrack, sound effects are all similar for obvious reasons. The quirky randomness is the same. The way the story seems to take place at school, but the characters meet around town and engage in silliness is the same.

But as stated earlier, it's a prototype. read more
Jul 31, 2014
GhostMaster1 (All reviews)
Looking for an anime with the wackiest, silliest, dirtiest humor out there? Want an anime that's so ridiculous and over the top that it would put other comedy anime to shame? Look no further than Katte Ni Kaizou, translated as, "Kaizou Who Does As He Pleases!"
Story: 5
To tell you the truth, the story description on the site is only true for the first two episodes. The whole idea about being a gullible boy with delusions isn't really carried out throughout the rest of the series. Still, it doesn't detract from how ridiculous this anime is.
Art: 10
The art is pretty memorable. Shaft made the characters' read more
May 28, 2020
SanaeK10 (All reviews)
Before Kumeta hit it big with Sayonara Zetsubou Sensei, there was Katte ni Kaizou, which started out as a series with some random off the wall humor and dick jokes to becoming what is essentially SZS-lite complete with social commentary and pseudo-philosophical musings. Shaft's 6 episode OVA captures this evolution so succinctly to the point of brilliance.

If you're reading this, there is absolutely no way that in 2020 you would stumble upon this OVA series by accident without knowing or watching SZS. It was how I came across it and while it did color my expectations to a fair degree, the show is read more

Recent News

SHAFT To Animate Kumeta Koji's Manga Katte ni Kaizo [Update Feb 9]

According to Natalie, Kumeta Kouji's manga Katte ni Kaizo was announced to get an OVA anime adaptation. The first volume will be released on April 27th. The pro...read more

Recent Forum Discussion

Poll: Katte ni Kaizou Episode 6 Discussion
stevewiess01 - Nov 4, 2011
31 replies by KagamiHiiragi »»
Jun 18, 8:01 AM
Poll: Katte ni Kaizou Episode 3 Discussion
tsubasalover - Aug 9, 2011
21 replies by KagamiHiiragi »»
May 28, 12:42 PM