 He appears to be in his late 20s/30s, and is the gang's most experienced and capable fighter.Tetsuo succeeds in knocking out five Shohoku players, among them Kaede Rukawa and Ryota Miyagi, but is brutally beaten up by Hanamichi Sakuragi.After Mitsui leaves the gang and rejoins the team, Tetsuo later runs into him after the former is heading home after getting his knee checked.