|Also Known As|
|Family|| Shizuka Mayumura (wife)|
Wataru Mayumura (son)
Michiru Mayumura (daughter)
|Occupation|| Student (graduated)|
Pro Baseball Player (retired)
|Team(s)|| Yokohama Marine Stars|
|Number|| 1 (Kaido)|
23 (World Cup)
|Manga Debut||Chapter 181|
|Anime Debut||Ep35: The End of the Battle|
|Voice Actor||Makoto Yasumura|
Through the majority after his acceptance, Ken practiced with rubber balls until entering the tournament finals. It was only during Goro Shigeno's admission to the academy, Ken "takes the gloves off" as a favor to Akira Oonuki to punish Goro for underestimating them.
- Gyroball, Forkball, Screwball and a Shootball (Which he only uses as his last pitch if he is throwing a perfect game).
Records and Acheivements
- Eiji Sawamura Award