Golden Pair (together with Eiji)
Mother of Seigaku
Egghead (by Niou)
Yakiniku Magistrate/Yakiniku Bugyo
School & Class
Seishun Academy (3rd Year) - 3-2 #3
Unnamed (Younger Sister)
Debut - Manga/Anime/Games/Movies
Chapter 4/Episode--/--/The Two Samurai
Oishi is a third year student at Seishun Academy (Seigaku) and the vice-captain of the tennis club.Oishi, as a doubles partner he is the perfect complement for the acrobatic Eiji. Oishi is a doubles specialist and is perhaps one of the best doubles players in the series.
Oishi has black hair. Oishi has two locks of hair that stand "inwards" on the top of his head. The top of his hair is black while the lower-half at the back seems to be shaved. He has a round face overall.
PersonalityEditOishi is known as the mother of Seigaku, because he constantly worries and frets for the team's well-being. This doesn't mean that he cannot crack or even be mean, though; he can be as spiteful to the others, as proved when Eiji went too far with his teasing during a training session prior to the Hyōtei matches and Oishi ended up knocking Eiji to the ground in front of everyone. Despite instances like that, overall Oishi is the most caring player of the team.
Two Years Prior To The StorylineEdit
Oishi and Tezuka initially became friends in their first year in the club. Once on there way home after practice, Oishi told Tezuka that if only first year students were allowed to be a regular player before the summer break. Seigaku would have a chance of getting into the Kantō tournament because of Tezuka's abilitites in tennis. Tezuka then responded that when their time comes, they should definitely lead Seigaku not to the Kantō tournament but to the Nationals. At one point, when Eiji was still a flashy singles player, Oishi played him and defeated him 6-4. From that point on, Eiji decided to play Doubles with Oishi until he could surpass him.
Prior to the Kantō Tournament, Oishi's wrist is injured during an incident where he saves a pregnant woman from falling. His injury forces Takeshi Momoshiro to play doubles with Eiji Kikumaru. The match that ensues is remarked upon by Hyōtei captain Atobe Keigo to be played not with just Momoshiro and Eiji, but with Oishi, as well - a doubles game with three. In the anime, the next match is against Josei Shonan in which Oishi goes back to the starting line-up and pairs with Kikumaru Eiji in Doubles 1.
Oishi returns for the match against Rikkai Daigaku Fuzoku, and he and Eiji play once more. During this match, the pregnant woman he helped shows up with her husband and newborn baby to watch him. However, they suffer a loss to Niou Masaharu and Yagyuu Hiroshi.
In the Nationals in the anime, the above event occurs somewhat differently. As the anime had already had Tezuka return, he instead plays a match with Ryōma Echizen, who had left the team at the end of the Regional Select team training camp, and returned in the first episode of the Nationals. The end result is the same, with Oishi giving up his place and re-injuring his wrist.
Although Oishi remains an observer during the match between Seigaku and Higa Chuu, when he observes Tezuka's match against Hyōtei Gakuen, he desires to make a comeback. Oishi re-registers to play with Eiji in Doubles 1, where the two are matched up against Ryō Shishido and Chōtarou Ootori.The two doubles pairs are practically even and go all the way to a tiebreak, and Oishi and Eiji achieve a new state called Synchro, where they move in perfect unison with one another.
However, Eiji stops and holds Oishi's wrist while in Synchro just before Oishi is about to score the point when he realizes the damage that will be done to Oishi's wrist and forfeits, allowing Shishido and Ootori to win. Once they match is over and they leave Synchro, they forget everything that happened while in Synchro. Oishi along with Kikumaru is rested during the match with Shitenhōji. Oishi returns to action during the Nationals Final against Rikkai Dai in Doubles 1 against Marui Bunta/Jackal Kuwahara pair. Marui and Jackal easily dominate and quickly go towards defeating the pair however it is revealed that Kikumaru and Oishi can now use Synchro at will and were choosing not to use Synchro until they knew Echizen was prepared to play in the next match otherwise there win would have been pointless. After hearing the news that Echizen could play in Singles 1, Oishi and Kikumaru access Synchro instantly and make a comeback and eventually defeat Marui and Jackal.
Oishi wins the Nationals with Seigaku after Echizen miraculously defeats Yukimura in Singles 1. It is revealed in an OVA that Oishi then prepares for his next High School entrance exam. As he tells Kikumaru he will not be entering Seigaku's High School division.
U-17 CampEditOishi along with the whole Seigaku team and several other Middle schoolers was invited to the Japan U-17 Camp. As an All-Japan Junior Representative candidate. All middle schoolers were able to attain a ball that the helicopter dropped which the condition was, those without a ball must go home.
He played a singles tie-break against Eiji Kikumaru and lost, thinking that they were to play as doubles were the loser goes home.
All the Middle Schoolers that lost their tie-break are taken away from the camp by coach however the driver takes a detour and they are met by the Mental Coach who takes them to where the other middle schoolers that lost their tie-break games are. He tells them to climb a mountain by the camp if they want the chance to stay in the camp. Oishi and the 26 other middle schoolers complete this task and end up meeting the High Schoolers who were unable to attain a ball from the helicopter. When they reach the top, they see the eliminated high schoolers training under the Drunken Coach.
After quick shuffle matches, the Top 20 U-17 players of Japan arrive back at the camp. He played a doubles match with Masaharu Niō against an identical twin high school players from the Top 20 named Mutsu Yūho No.16 and Mutsu Yūma No.15. Oishi and Niou request a doubles match against the identical twins pair Mutsu Yūho and Mutsu Yūma. Niō once again used Illusion and impersonated Kikumaru Eiji thus he was able to use the Synchro with Oishi and took a game from the twins quickly. However, the twins have more physical strengths and abilities in Synchro. So as the twins become Synchronized, they begin to crush Niou and Oishi. Niou and Oishi, realizing they are about to lose desperately think of a plan. Niou, showing that he had now furthered his Illusion ability so greatly that he could become not only any Middle Schooler but also any High Schooler. Before they became exhausted, Niō impersonated the twins and Synchronized with them. With the three of them Synchronized as triplets, Niou was able to disturb the play by making them play shots and stand in position that would make them vulnerable to Oishi Territory. Oishi and Niou's plan works and the two make a miraculous comeback and defeat the twins making Niou the No.15 All-Japan Junior Representative.
Official Middle School TournamentsEdit
|2007 Tokyo Prefectual||Quarterfinals||Yamabuki Middle School||Unknown Doubles||Seigaku OB||Minami Kentarō/Higashikata Masami||Lost (Unknown)|
|2007 Nationals||Unknown||Unknown||Unknown Doubles||Kikumaru Eiji||Unknown||Won (Unknown)|
|2008 Tokyo District||Quarterfinals||Gyokurin||Doubles 1||Kikumaru Eiji||Suzuki/Iguchi||Won (6-0)|
|2008 Tokyo District||Semi-Finals||Mizu no Fuchi||Doubles 1||Kikumaru Eiji||Sawaguchi/Kaneda||Won (6-0)|
|2008 Tokyo District||Finals||Fudomine Middle School||Doubles 1||Kikumaru Eiji||Uchimura Kyōsuke/Mori Tatsunori||Won (6-2)|
|2008 Tokyo Prefectual||Round 3||Kamata||Doubles 1||Kikumaru Eiji||Yamamoto/Yano||Won (6-0)|
|2008 Tokyo Prefectual||Round 4||Akiyama 3rd||Doubles 1||Kikumaru Eiji||Suzuki/Honmura||Won (6-1)|
|2008 Tokyo Prefectual||Quarterfinals||St.Rudolph||Doubles 1||Kikumaru Eiji||Akazawa Yoshirō/Ichirō Kaneda||Lost (6-7) (3-7)|
|2008 Tokyo Prefectual||Finals||Yamabuki Middle School||Doubles 1||Kikumaru Eiji||Minami Kentarō/Higashikata Masami||Won (7-5)|
|2008 Kantō Regionals||Round 1||Hyōtei Academy||Reserve Player||None||None||None|
|2008 Kantō Regionals (NOTE-1)||Quarterfinals||Midoriyama||Reserve Player||None||None||None|
|2008 Kantō Regionals (NOTE-1)||Quarterfinals||Josei Shonan||Doubles 1||Kikumaru Eiji||Kiriyama Daichi/Ōta Shō||Won (7-5)|
|2008 Kantō Regionals||Semi-Finals||Rokkaku Middle School||Reserve Player||None||None||None|
|2008 Kantō Regionals||Finals||Rikkai Daigaku Fuzoku||Doubles 1||Kikumaru Eiji||Niō Masaharu/Yagyū Hiroshi||Lost (4-6)|
|2008 Nationals||Round 2||Higa Middle School||Reserve Player||None||None||None|
|2008 Nationals||Quarterfinals||Hyōtei Academy||Doubles 1||Kikumaru Eiji||Shishido Ryō/Ōtori Chōtarō||Lost (6-7) (7-9)|
|2008 Nationals||Semi-Finals||Shitenhōji||Reserve Player||None||None||None|
|2008 Nationals||Finals||Rikkai Daigaku Fuzoku||Doubles 1||Kikumaru Eiji||Marui Bunta/Jackal Kuwahara||Won (7-5)|
- NOTE-1 The match against Midoriyama only took place in the manga, while Jōsei Shōnan's match existed only in the anime.
Seigaku Ranking MatchesEdit
|4/2008||Block A||Tezuka Kunimitsu||Lost (1-6)|
|6/2008||Block D||Tsuda Shūshi||Won (6-0)|
|6/2008||Block D||Ikeda Masaya||Won (6-0)|
|6/2008||Block D||Mikami Kōji||Won (6-0)|
|6/2008||Block D||Kuwahara Naoya||Won (6-0)|
|6/2008||Block D||Echizen Ryoma||Lost (3-6)|
|Year 2006||Seigaku||Kikumaru Eiji||Won (6-4)|
|8/2008||Seigaku||Tezuka Kunimitsu/Echizen Ryoma (NOTE-1)||Lost (0-6)|
- NOTE-1 In the manga, Oishi played against Tezuka, while in the anime/OVA, Oishi played against Echizen. Regardless, the results were the same, but the way the match went was different.
U-17 Camp ResultsEdit
|Type of Match||Partner||Opponent||Score|
|Tiebreaker-Style Elimination Match||None||Kikumaru Eiji||Lost (Note-1)|
|Foreign Expedition Group Challenge||Niō Masaharu||Mutsu Yūma/Yūho Mutsu||Won|
- NOTE-1 In the Manga, Oishi lost with the score 4-7, while in the anime, he lost with a score of 6-8.
Playing Style and TechniquesEdit
Oishi is a Counter-Puncher, and is well-known for his doubles play, especially with Eiji (which earned them the title of the Golden Pair). Despite his relatively average stats (as shown in the New Prince of Tennis OVA, episode 3, his stats, out of 5, are: 2 in Power and Speed, 3 in Stamina and Mental, and 3.5 in Technique) he is quite skilled at analyzing the opponent and keeping his cool in the game, allowing him to change the flow of the game at the most crucial time and is a very successsful game-maker.
- Moon Volley (ムーンボレー)
- A topspin-lob volley hit high into the air and landing directly on the baseline (or anywhere else that is unprotected at the time).
- Australian Formation (オーストラリアン・フォーメーション)
- A specialty formation Oishi and his double's partner Eiji Kikumaru perform. It involves standing directly on the center line and confusing the opponents as to which way each player will move when the ball is placed into the opposing court. It requires extreme knowledge of one's double's partner.
- I-Formation (Iフォーメーション)
- A variation of the Australian Formation, Eiji stays below the net while the Golden Pair both line up on the center line. This allows Oishi to serve without worry about Eiji and confuses the opponent even more to where to return the ball to. Also, by aiming at the center of the court, the opponents have a tougher time returning the ball.
- Spin Serve (Anime only) (スピンサーブ)
- Very similar to the Kick Serve where as a large amount of the serve motion at an oblique angle causing it to spin. Jōsei Shōnan whose small body rendered him incapable of returning it.
- Oishi Territory (大石の領域)
- This formation has the defense expert Oishi go to the net, while attacker Eiji stays in the back. Using this, Oishi combines his game making abilities with Eiji's Seal Step in order to control the flow of the game.
- Synchronization, known as 'Synchro' (同調)
- When playing in the nationals with Kikumaru as his doubles 1 partner against Shishido Ryo and, they become fully synchronized and moved as if they were one; breathing as one and knowing exactly what their partner's next move would be. It was said that doubles players could not go pro without 'synchronization'. During the national finals against Marui Bunta and Jackal Kuwahara, he and Eiji entered this state willingly.
- Committee: Committee chairmen of the health department
- Worst Subject: Math
- Often visited place in school: Clubroom
- Elementary School: Seishun Gakuen Dai Dai-ni Elementary School
- Uses allowance on: The barber (haircuts)
- Favorite Motto: "It's the thought that counts."
- Favorite types of movies: Romance
- Favorite type of books: Romance novels
- Favorite type of music: Environmental music
- Favorite date spot: Aquarium
- Most wanted thing right now: Telescope
- Daily Routine: Astronomy (watching the stars, etc)
- Doesn't like/bad at doing: Thunder, pollen
- Special skill aside from tennis: Able to tell if a young bird is a male or female
- His uncle, Akitaka, is the doctor who took care of Tezuka after his arm was injured.
- He is portrayed as the impulsive, loving, and somewhat violent mother of the TeniPuri family.
- Oishi seems to be pretty popular among the Seigaku female students. In the anime he once goes searching for Momoshiro, enters the second-year classrooms and is surrounded by girls who want him to sign their notepads.
- According to Ryoma and the other regulars, Oishi has fairly bad drawing skills.
- Oishi is also involved in the student council, as indicated in the Prince of Tennis manga fanbook.
- For the live-action adaptation film of The Prince of Tennis, Tenimyu actor Hiroki Suzuki portrays Oishi. In The Prince of Tennis Musicals, Oishi is portrayed by actors Tsuchiya Yuichi (2003-2005), Hiroki Suzuki (2005-2006), Yukihiro Takiguchi (2006-2007), Yuya Toyoda (2007-2009), Yuki Tsujimoto (2008-2010) and Jin Hiramaki (2011-present).
- In the second poll, and 17th in the third. However, he had his strongest showing in the fourth poll, where he moved up to 8th place.
- His name is sometimes spelled "Syuitiroh" in some artwork, probably because the "chi" hiragana technically belongs to the "t" row.
- Oishi has stated that he wishes to become a doctor in the future.
- Oishi, due to his specialty in Doubles, has never played a Singles Match in an official tournament match.