After his brother, Shuuichi, is injured in an attack, Shoma set out to find those responsible. He partners up with Natsu and Roberto after finding out they are doing similar investigations of their own. His good ending has his brother encouraging him to become a pro baseball player.
After apparently being attacked by "Batsu," a student by the name of Momo Karuizawa befriends Shoma. After an internal conflict between the Gorin High students sees Shoma separate from his friends, Momo convinces him to help her beat up the students from other schools. Eventually Momo betrays Shoma and reveals her plan to have him help her cause chaos among the schools. He later reunites with his friends who welcome him back with open arms.
Shoma is a brash and impulsive person with a short fuse who was known for getting into fights before joining his school's baseball team. He is very self-conscious about his height, which Natsu takes great pleasure in ridiculing. He is childhood friends with Nagare whom he sees as a brother figure. All his friends know he and Natsu have feelings for each other but they both have trouble admitting it.
- Shoma lives with his brother, Shuuichi, his parents and his grandfather.
- Prior to the first game, his brother was sent to an elite baseball training camp called Baseball Sparta by their father.
- Shuuichi appears as one of the instructors in School Life Mode in Nekketsu Seisyun Nikki.
- As expected, Shoma is talented at physical education but struggles with music and English.
- His birthday shares the same date as one of Japan's national holidays, the National Sports Day.
- He is voiced by Yūji Ueda.
- Shoma appears in UDON's Street Fighter Legends: Sakura comic.
- In a Dead Rising 3 DLC pack, Chuck Greene can cosplay as Shoma.