He led the basketball team to the runner - up spot of the All - Japan High School Basketball Tournament in his final two years with the program .
Watanabe attended Jinsei Gakuen High School in Kagawa .
Watanabe led the basketball team to the runner - up spot of the All - Japan High School Basketball Tournament in Watanabe 's final two years with the program .
Watanabe attended Jinsei Gakuen High School in Kagawa .