Birthday: March 6
Age: 27
Astrological sign: Pisces
Height: 177 cm
Weight: 63 kg
Blood type: Type O
Handedness: right
Favorite brands:
Shoes - ellesse TN161
Racket - the racket of club members that are near him
Interests: horse racing, mahjong

Osamu Watanabe is the coach of Shitenhouji's tennis club.