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Ren Mihashi

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Ren Mihashi (三橋 廉 Mihashi Ren) is the main character in the Big Windup! series. He is the current pitcher and ace of Nishiura High School's baseball team and former pitcher, and ace, of Mihoshi Middle School section's, whose nervousness and extreme lack of self-confidence is at odds with his skill, a result of his passion and dedication to pitching.


During middle school, Mihashi was bullied by his teammates on the baseball team after gaining a place on the team apparently through favoritism ( due to his grandfather owning the school ).

The other members of the team were resentful because of this and felt that their reserve pitcher, Kanō, was far more talented than Mihashi. However, Mihashi refused to give up the mound and pitched in every single one of their games, even when his teammates stopped trying and the catcher wouldn't give him signs to throw anymore. Eventually, Mihashi decided to change schools for high school and succeeded in gaining a place in Nishiura. He felt guilty for ruining his junior high team's enjoyment of the game, and promised himself that he won't play baseball in high school; however, he let it slip that he was a pitcher whilst visiting the baseball club, and was thus dragged into it, given that they had no other pitcher.

Although Mihashi is convinced that he has no talent, he has been practicing hard at pitching since elementary school, and his new teammates, in particular the talented catcher, Abe, are astounded at his high accuracy. When pitching, he divides the strike zone into nine sections, which is said to be above the level of a professional pitcher, who would only divide it into four. Mihashi also has four breaking balls, including an unusual fastball which often confuses opposing batters and a slider which drops a little. His pitches are said to be quite slow, although with training from Momoe his speed increases later on in the series. He is also starting to learn how to pitch the "proper" fastball (with backspin) and throwing the ball from the windup position.


Mihashi has medium-long, orange-ish brown hair and hazel eyes. He is either seen wearing the baseball club's or the school's uniforms, or sport clothes.



Ren during the game against Tosei

Mihashi is often seen anxious and has a very low self-confidence. He is shown to have always had this personality; however, it became much more pronounced in middle school during the time when he was bullied by his teammates on the baseball team. As such, he has struggles on saying his opinion which often leads to Abe's irritation.

Despite his low self-confidence, Mihashi is very stubborn, refusing to give up the mound even when so exhausted that he starts losing control of his pitches. He also feels upset at the idea of the team needing a reserve pitcher, going as far as having Tajima write the number "1" on his uniform's back in order to accept the idea half-heartedly. He loves pitching so much that his mother mentions he's always holding a ball, even in his sleep.

Mihashi's grades are very poor, and he says he had to work hard in order to get into Nishiura. Despite his clumsiness, he is also shown to have a talent in cooking and is confident enough to tell Abe what to do in the kitchen. He is quite gullible and loves to eat.


Takaya Abe Edit

Mihashi's relationship with Abe as a battery is quite strained in the beginning, with Abe quick to lose his temper and Mihashi fearful of angering him. Mihashi greatly respects Abe and is eternally grateful to him for wanting to be his catcher. He notes that if it weren't for Abe's skill at reading the opposing team and calling for the right pitches, Mihashi could never make anyone strike out. Abe appreciates how hard Mihashi works on his control and his dedication to pitching for the entire game, though Mihashi still firmly believes it would be nothing without Abe, to the point that Abe promises not to get sick or injured for their three years of high school, in order to be able to catch all of Mihashi's pitches. Later on in the manga, they are seen communicating better and without the strain they had at the beginning, as Abe begins to understand Mihashi better, and Mihashi, in return, speaks up more and properly toward Abe.

Yūichirō Tajima Edit

He gets on well with the rest of his teammates, particularly Tajima, who always seems to understand him even when Mihashi can only stutter a few words, sometimes even by fidget. Tajima often acts like a big brother to Mihashi, protecting him and getting angry if he thinks Mihashi is being bullied. It is also shown that Mihashi would hang out with Tajima often enough that his grandfather as well as family would call Mihashi by his first name.

Hamada Yoshirō Edit

He and Hamada were good childhood friends. They lived in the same apartment building until Mihashi moved away. They would play baseball together, and Hamada would give Mihashi his old glove when Mihashi couldn't get one. They don't talk as much in the present, but their childhood friendship toward each other has yet to disappear.

Ruri Mihashi Edit

He is also close to his cousin, Ruri, having lived with her family during middle school, though he dislikes it when she calls him 'Renren'. It is stated that back in his middle school days, he often told her not to come to his matches, thinking that he was going to lose and make himself embarrassed in front of Ruri. However, this changed as Ren entered high school, as he specially called her before their match with Tosei, asking if she could come.

Shūgo Kanō Edit

He is still friends with Kanō in spite of being rivals for the position of pitcher in middle school. Although he became more formal with Kanō in school, likely out of guilt for not giving up the mound to him, Kanō has always thought that Mihashi was a better pitcher than him. They are now on good terms again, and Mihashi calls Kanō by his childhood nickname, 'Shuu-chan'. In the manga, after Mihoshi lost an important game, he messaged Mihashi, telling him about it and that he, too, will aim for Koshien next time, and as such, they became rivals anew.


  • Initially, Mihashi wears panda-like undershirts (used in middle school) but he later switches to pitch-black version due to the school's recommendation.
  • He has a fear of dogs.
  • He takes 15 minutes to go to school.
  • Surprisingly enough, he likes people in nurse outfits.



[v · e · ?]
Nishiura High School
Baseball Team Players Ren Mihashi  •  Takaya Abe  •  Kazutoshi Oki  •  Yūto Sakaeguchi  •  Yūichirō Tajima  •  Shōji Suyama  •  Fumiki Mizutani  •  Kousuke Izumi  •  Azusa Hanai  •  Shintarō Nishihiro
Staff Maria Momoe  •  Tsuyoshi Shiga  •  Chiyo Shino'oka
Ouedan Yoshirō Hamada  •  Riki Kajiyama  •  Keisuke Umehara  •  Chika Fukami  •  Yoshiyuki Matsuda  •  Shōko Nonomiya  •  Ayano Tomoi  •  Mia Ogawa
Family Misae Abe  •  Takashi Abe  •  Shun Abe  •  Kikue Hanai  •  Haruka and Asuka Hanai  •  Keiko Izumi  •  Naoe Mihashi  •  Reiichi Mihashi  •  Kiyoe Mizutani  •  Kazumi Nishihiro  •  Kumiko Oki  •  Etsuko Shino'oka  •  Eiko Suyama  •  Miwako Tajima
Others Ochi  •  Yuri
Saitama Prefecture Schools
Musashino First High School Motoki Haruna  •  Naoto Kaguyama  •  Yūki Machida  •  Kyōhei Akimaru  •  Tomoyuki Sasaki  •  Akio Totsuka  •  Hironori Ookawa  •  Keita Fukuhara  •  Syūya Nakayama  •  Shintarō Sōma  •  Miyashita Suzune
Tosei High School Junta Takase  •  Kazuki Kawai  •  Riō Nakazawa  •  Yūji Motoyama  •  Shingo Shimazaki  •  Jin Mashiba  •  Takehiko Aoki  •  Masaya Matsunaga  •  Keisuke Yamanoi  •  Toshihiko Maekawa
Sakitama High School Yutaka Ichihara  •  Daichi Sakura  •  Masoto Sawamura  •  Reiichi Harada  •  Toru Sugita  •  Hiroki Oyama  •  Atsushi Furusawa  •  Ryoichi Kamimura  •  Mitsuteru Tanaka
Bijōdaisayama Yoshito Takenōchi  •  Takumi Kashima  •  Yū Saitō  •  Takeshi Kurata  •  Takamitsu Matsushita  •  Atsushi Yano  •  Tetsurō Ishikawa  •  Kō Kawashima  •  Kentarō Kitamura  •  Makoto Wada  •  Naomasa Miyata  •  Roka Nakazawa  •  Tomoya Takii
Kasukabe Municipal High School Aoi Suzuki  •  Ryō Suzuki  •  Yūki Shiba  •  Syōhei Kōno  •  Takahito Ono  •  Hitoshi Hashimoto  •  Masayoshi Katō  •  Kō Takahashi  •  Ryōta Mori
ARC Academy High School Yoshimi Ootagawa  •  Tomonari Yoshida  •  Yoshiaki Matsubara  •  Hayato Kosugi  •  Tomomasa Tanabe  •  Chihiro Shioiri  •  Akira Kitagawa  •  Junpei Sakamaki  •  Yūji Masuda
Other Schools
Mihoshi Academy Shūgo Kanō  •  Atsushi Hatake  •  Hiroyuki Oda  •  Ruri Mihashi
Tōri High School Shōma Kamishiro  •  Natsu Ishida  •  Masami Fukuda
Namisato High School Yūgo Nagamiya  •  Atsushi Ishii  •  Hayato Morikasa

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