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, Sci-FiSci-Fi
Themes: ParodyParody, SchoolSchool
Demographic: ShounenShounen
Duration: 23 min. per ep.
Rating: R+ - Mild Nudity


Score: 6.861 (scored by 1023410,234 users)
1 indicates a weighted score.
Ranked: #49632
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #4062
Members: 29,899
Favorites: 37

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Ranked #4963Popularity #4062Members 29,899
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Episodes: /6


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


Tachiki, Fumihiko


Ishida, Akira


Takaoka, Binbin


Nagata, Yoriko

Katsu, Mother

Hirata, Mana


Ooshima, Miku
Assistant Producer
Shinbou, Akiyuki


Opening Theme

Apple Music
Amazon Music
Youtube Music
"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)


May 28, 2020
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 ...
Jan 17, 2017
Mixed Feelings
Rate of 6(fine)
seen via english subtitles

art-original and stands out
sound- crisp and clear. Characters personality was matched by the voices.

art-very white. I am guessing they were going for either a highlight for the characters or wanted each character to have highlights in their hair. Yet, there was real benefit in doing that. There was nothing gained nor lost. I suppose it makes for an easier identification in random anime shows casts. For me, it would have been more pleasant on the eyes if they ditched it. Lastly, the haircut art designs were somewhat copied and pasted in. Do you recall bowl haircuts? if not, they are ...
Jun 10, 2019
I found his anime pathetic and even though it is a comedy not very funny. It included a lot of sexual jokes which I thought were discriminating and disgusting instead of funny.

The characters were kind of pathetic and cringy. With no real storyline or plot, these characters don't develop or grow on you. The artist also used a lot of the same facial expressions on different characters.

The artstyle is definitly not to my taste and didn't make the anime any better. Only the music from the intro was enjoyable. But the sound effects were really dramatic and over the top.

Overall I really disliked this over ...

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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 1 Discussion ( 1 2 )
tsubasalover - May 25, 2011
66 repliesby MenchiK1 »»
Mar 23, 9:31 PM
Poll: Katte ni Kaizou Episode 6 Discussion
stevewiess01 - Nov 4, 2011
33 repliesby Axris29 »»
Jun 7, 2023 3:53 AM
Poll: Katte ni Kaizou Episode 5 Discussion
stevewiess01 - Nov 4, 2011
21 repliesby Koberu-kun »»
Feb 25, 2021 6:49 AM
Poll: Katte ni Kaizou Episode 2 Discussion ( 1 2 )
tsubasalover - May 26, 2011
56 repliesby anikevin »»
Jul 6, 2020 11:57 PM
Poll: Katte ni Kaizou Episode 4 Discussion
notsureifsrs - Aug 12, 2011
21 repliesby blank »»
Jul 22, 2019 6:11 PM