Kenkō Zenrakei Suieibu Umishō: Wikis


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Kenkō Zenrakei Suieibu Umishō
ケンコー全裸系水泳部 ウミショー
Genre Harem, Sports
Author Mitsuru Hattori
Publisher Kodansha
Demographic Shōnen
Magazine Weekly Shōnen Magazine
Original run 20052008
Volumes 9
TV anime
Director Kōichirō Sōtome
Writer Mamiko Ikeda
Studio Artland
Network Japan Chiba TV, Animax
Original run July 4, 2007September 26, 2007
Episodes 13
Anime and Manga Portal

Kenkō Zenrakei Suieibu Umishō (ケンコー全裸系水泳部 ウミショー ?, lit. Kenkō Nude Swimming Series Umishō) is a manga series by Mitsuru Hattori, which has been serialized in Kodansha's Weekly Shōnen Magazine from issue 33 since 2005.[1] It has been adapted into a TV anime series, directed by Kōichirō Sōtome and written by Mamiko Ikeda[2], which premiered in Japan on numerous television stations from July 2007, and a video game.



Within the Kanagawa prefecture lies the seaside city of Umineko. There, Okiura Kaname, 2nd year high school student, attends Umineko Shōgyō High School (海猫商業高等学校 Umineko Shōgyō Kōtō Gakkō ?, lit. Umineko Commercial High School), or Umisho for short. He is also the manager of the Umisho's swim team though he himself doesn't know how to swim. In fact, he is afraid of the water stemming from an incident which occurred some years ago. While he was at the beach, he had nearly drowned when a 'mermaid' pulled him under the water. He joined the school's swimming club in order to learn how to swim, but the club is filled with weirdos, who don't teach him swimming.

One day, a floating house arrives at the shores of Umisho bearing two persons. One of these is a cheerful, sunny, happy-go-lucky girl named Ninagawa Amuro, a transfer student to Umisho, and the other is her father. Her incredible swimming speed makes her an instant hit with the swimming club, but Okiura is surprised, as she reminds him of the mermaid he saw only once in his early childhood. After her floating house is destroyed during a storm she moves to Kaname's house.

The fictional island, where the series is set, is modeled on the real island of Enoshima in Fujisawa, Kanagawa.



Amuro Ninagawa (蜷川 あむろ Ninagawa Amuro ?) Seiyū: Aki Toyosaki
Second year student, and a new transfer student from Okinawa at Umishō. Despite her being a dedicated and skilled swimmer, she finds difficulties in performing at competitions due to her not being used to the rules and environment of professional swimming (for instance, in her first attempt at swimming in a pool, she bumped her head on the pool's edge on the opposite end from where she started, and cried for some time from the headache, since she was used to swimming in the open ocean). Among her other uncommon habits, she prefers swimming nude, and has no shame of doing so beside those she got used to, especially Kaname. The X's she wears on her head where given to her by her grandmother and is so dedicated to the story her grandmother told her about if she was to lose them, she actually suffers the symptoms that were later explained by her father that his mother "made them all up".
Kaname Okiura (沖浦 要 Okiura Kaname ?) Seiyū: Toshiyuki Toyonaga
Second year student, and the swimming team's manager. He had a traumatic experience involving a creature he describes as a mermaid during his childhood, and after which he has been afraid of swimming ever since. However this scenario started to change after Amuro's arrival at Umishō. Always in trouble due to Amuro's unpredictable behavior, he usually denies his growing feelings for her. In the last episode it is revealed that she is the "mermaid" that he saw when he was a kid, but she wasn't trying to drown him. Instead she was trying to save him from drowning as he slipped off the rock he was standing on. The anime series ends with her surprising him with a kiss, while the manga series ends with him married to her with a son and wandering on the sea just like when he just met her.
Momoko Orizuka (織塚 桃子 Orizuka Momoko ?) Seiyū: Hitomi Nabatame
Third year student, and vice-captain of the swimming team. The most rational and serious character, she serves as the straight man of most characters and can't stand the antics of Ikariya. Just after meeting Amuro, she realizes her hidden potential and recruits her to the swimming team, after challenging her to a match and being impressed with her speed in the water. She ends up being a grade school teacher.
Maki Ikuta (生田 蒔輝 Ikuta Maki ?) Seiyū: Ai Shimizu
A first year student, nicknamed Makio (マキオ ?). Too small for her age, she is usually mistaken as a junior high student. Despite being a member of the swimming team, she is still learning how to properly swim by taking lessons from Kaname. She later teams up with Nanako because both of them have small breasts.
Masa Ikariya ( 碇矢 雅 Ikariya Masa ?) Seiyū: Makoto Yasumura
Team Captain, nicknamed Ikamasa. Third year, muscle-bound, and obsessed with shaving his and other people's body hair, and with wearing revealing Speedo bikini swim suits. He is, in fact, the most annoying character of the swim team, driving most of the characters crazy from his antics. It is stated by Sanae that the only reason he is the captain is because she and Momoko needed three students to start the swim club, and just dragged him in. However, due to her tendency to make up stories this might not be true. By the end of the manga series, he becomes a bar owner and promises Orizuka that his bar will always remain opened whenever she wants to complain about her students.
Mirei Shizuoka (静岡 みれい Shizuoka Mirei ?) Seiyū: Yukari Fukui
A second year. Admired by the boys, she is very self-conscious when people stare at her. Her secret promiscuity is a recurring gag in the series: she wears skimpy lingerie under her clothes, has a collection of dildos and although she doesn't like people looking at her, she likes to look at members of the opposite sex or anything that resembles them (ie a giant statue or a large horn). It's revealed when Kaname goes to her house that apparently she got this sexual behavior from her parents, who engage in sexual roleplay. She is a very skilled swimmer as she almost won the Kantou Tournament in 200 meters the year before the series starts. Her grandfather is the creator of the Shizu Group.
Maaya Nanako (魚々戸 真綾 Nanako Maaya ?) Seiyū: Sayuri Yahagi
First year student. A famous swimmer and model who transfers to Umishō in order to get close to Kaname, for whom she has had a crush since childhood. She considers Amuro as a rival and competes with her for Kaname's attention. She has a noticeable small fang and wears a swimsuit different from the rest of the team. Like Maki she has small breasts.
Sanae Kise (黄瀬 早苗 Kise Sayane ?) Seiyū: Ryōko Shintani
A third year student. A co-founder of Umisho's swimming club and Orizuka's childhood friend. Usually tends to bring trouble to those around her. She also makes up stories and lies just to tease others, and to also gain other guys attention.
Chigusa Yasu (安 千草 Yasu Chigusa ?) Seiyū: Yūka Iguchi
A first year.
Kaori Himekawa (姫川 佳織 Himekawa Kaori ?) Seiyū: Ayumi Murata
A second year, and one of the members of the swimming team.
Yamana Yoshizawa (吉澤 やまな Yoshizawa Yamana ?) Seiyū: Yukiko Monden
A second year.
Takeda Seito (Seito Takeda) Seiyū: ?
A first or second year, and the another pervert of the swimming club.
Tsunumi Isao (Isao Tsunumi) Seiyū: ?
Tobe Jun (Jun Tobe) Seiyū: ?
A manga only character. He is the personal trainer of Maaya and also happens to be a top model featured in weekly column in swimming magazine. He actually happened to only be Maaya's coach so that he could get close to Okiura, her childhood friend because he really wanted to be his coach. He actually has zero interest in girls and those is in truth he is a homosexual as he says this out loud in front of everyone.
Taku Ikariya
A manga only character. He is the younger brother of Masa and competes in the same tournament as his brother (even in the same events as him). He has also been said to look like his brother only cooler looking (he even is better at swimming and studying then his brother). He also happened to be on the same swimming team as Momoko and Masa in elementary and middle school. He seems to have a crush on Momoko and they seem to get along as well. He goes to Shogyo all-boys senior high school. He seems to have a rivalry with his brother for Momoko's attention.

Shinomiya Swimming Team

Nanjou (Nanjou) Seiyū: ?
Proppally captain of the Shinomiya highschool swimming team. First introduced at chapter 28 at the prefectural meet. She is Orizukas rival.
Naruko (Naruko) Seiyū: ?
She is another member of the Shinomiya Swimming Team. She is almost always seen with Nanju, But she has said that Shinomiya is Nanjo's on woman show, so they maeby aren't that good friends.


  • First volume: released January 17, 2006, ISBN 4063636186
  • Second volume: released April 17, 2006, ISBN 4063636623
  • Third volume: released August 17, 2006, ISBN 4063637107
  • Fourth volume: released December 15, 2006, ISBN 4063637646
  • Fifth volume: released April 17, 2007, ISBN 9784063638202
  • Sixth volume: released July 17, 2007, ISBN 9784063638554
  • Seventh volume: released October 17, 2007, ISBN 9784063639025
  • Eighth volume: released March 15, 2008, ISBN 9784063639667
  • Ninth volume: released June 17, 2008, ISBN 9784063621143

Other media


The series has been adapted into an anime TV series, which premiered in Japan from July 3, 2007 on Chiba TV, Tokyo MX, and numerous other UHF television stations. Animated by Artland, it is being directed by Kōichirō Sōtome and written by Mamiko Ikeda.


  • Original Creator: Mitsuru Hattori
  • Planning: Hiroaki Morita, Yoshirō Kataoka
  • Series Composition: Mamiko Ikeda
  • Character Design and Chief Animation Director: Rie Nishino
  • Art Director: Chikako Shibata
  • Color Designs: Tomoko Yamazaki
  • Photography Director: Satoshi Fujita
  • Editing: Hiromasa Mastumura
  • Sound Director: Kazuya Tanaka
  • Music: Yasumasa Satō
  • Music Producers: Michiko Koyanagi
  • Music Production: 5pb.
  • Sound Effects: Noriko Izumo (Suwara Production)
  • Sound Studio: Delfi Sound, Seion Studio
  • Sound Production: DAX Production
  • Promotion: Tomoko Hasegawa, Teruhiko Satō, Katsunori Takahashi, Yuri Koya
  • Associate Producers: Noriko Doi, Tetsuko Otani
  • Producers: Bunpei Ogawa, Hiroyuki Ōmori
  • Executive Producer: Hidenobu Watanabe
  • Director: Kōichirō Sōtome
  • Animation Production: Artland
  • Production: Umishō Production Committee (Geneon Entertainment, Marvelous Entertainment, 5pb., Pony Canyon Enterprise)

List of episodes

# Title Original air date
01 "Churaumi!"
"Churaumi!" (ちゅらうみっ!) 
July 4, 2007
This introduces the characters and the setting. On the beach, Momoko Orizuka and Kaname Okiura are relaxing when a houseboat comes in. On that houseboat is Amuro Ninagawa. She is holding a three-foot long shark in her hand. She comes in and offers the shark to Momoko. Momoko refuses, saying she doesn't like a dead shark. Amuro says the shark is still alive. It then springs to life in Amuro's hand and tries to bite Momoko, but ends up tearing Momoko's bikini top off. Then Amuro dives into ocean, seemingly vanishing, only to emerge some distance into the waters within seconds, impressing everyone, especially Momoko. 
02 "I Might Be... Interested..."
"Kyōmi... Aru... Kamo..." (興味・・・・ある・・かも・・・) 
July 11, 2007
03 "I'll Show You!"
"Miseru!" (魅せる!!!) 
July 18, 2007
The team captain can't concentrate on the swim meet that they're at because his father's restaurant is in financial trouble. To help his family out, Amuro and the other swim team girls spend a few days serving customers wearing only aprons and swimsuits. Naturally, this attracts a lot of men. 
04 "I'm Going to Show You"
"Misete Agerunda kara" (見せてあげるんだから) 
July 25, 2007
05 "Do You Want Mine, Too?"
"Atashi no mo hoshii" (あたしのもほしい) 
August 1, 2007
06 "No!"
"Me!" (めっ!) 
August 8, 2007
07 "Curse"
"Noroi" (呪い) 
August 15, 2007
08 "Take A Good Look"
"Yo~ku Mitenasai" (よ〜く見てなさい) 
August 22, 2007
09 "Help Me Forget..."
"Wasuresasete..." (忘れさせて...) 
August 29, 2007
10 "Breast Massage?"
"Nyū Nyū?" (にゅうにゅう?) 
September 5, 2007
It's the summer festival and the team is there. Maki Ikuta and Maaya Nanako are in the women's room. Maki tells Maaya that she heard that massaging the breast will make it grow. Mutual groping ensues. 
11 "Could It Be..."
"Masaka no..." (まさかの・・・・) 
September 12, 2007
12 "Oma Oma"
"Oma Oma~" (おまっおま〜♪) 
September 19, 2007
It's the Kantou prefecture swimming tournament. and the Umisho swim club is there. After doing poorly in the preliminaries due to a bet, the girl's team pours things on in the middle. In the relay race, the team discovers another team is cheating when they use a song to help the swimmer along. To mess this up, Masa, Amuro and some of the others sing their own song. Masa parading around and unintentionally flashing the singers of the other team cause them to mess up. Unfortunately, in the final lap of the medley, Momoko pulls a muscle in her leg, causing her to miss the rest of the tournament. 
13 "Mermaid"
"Ningyo" (人魚) 
September 26, 2007
Amuro gets chosen to replace Momoko in the relay squad. Masa attempts to replace Momoko by dressing in drag, but the team tells him no. The rest of the races are run. When Umisho's team appears to get left behind, Amuro trounces the competition with her speed and wins for Umisho. After the competitions, Kaname and Amuro spend time together at the seaside, and when Kaname gets pulled into the water by Amuro, he finally remembers what really happened during his childhood. He nearly drowned because he lost his footing on the ocean floor, then a young Amuro, whom Kaname likened to mermaid because of her swimming style, rescued him. During the credits the Swimming Club take a trip, where in the end Amuro surprises Kaname by kissing him. 

Theme songs

  • Opening theme: "Dolphin☆Jet"
Lyrics and composition: Chiyomaru Shikura, arrangement: Kōji Ueno, performance: Ayane
  • Ending theme: "Splash Blue ~ Sun and Lemonade" (Splash BLUE〜太陽とレモネード Splash BLUE ~ Taiyō to Remonēdo ?)
Lyrics and composition: Urara Takai, arrangement: Kōji Ueno, performance: Ayumi Murata

Internet radio

An internet radio version of the anime series, Kenkō Zenrakei Suieibu Umishō: Junbi Undō (ケンコー全裸系水泳部 ウミショー 準備運動 ?), was first streamed on the Japanese websites Ōnsen and BEWE from May 16, 2007 and June 27, 2007. A continuation, Kenkō Zenrakei Suieibu Umishō: Natsu!! Honban (ケンコー全裸系水泳部 ウミショー 夏!!本番 ?), began streaming on July 4, 2007. The first version of the series featured Hitomi Nabatame, seiyū of Momoko Orizuka, while the continuation featured Nabatame and Aki Toyosaki, seiyū of Amuro Ninagawa. Sources:[2][4]

Video game

5pb inc. published an Umisho game on PlayStation 2, under the 5gk. (The Five Games and Kid) title.


External links

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