[1] Watanabe was born in Shizuoka Prefecture on April 10, 1974.
[2] After graduating from Waseda University, he joined J1 League club Kashiwa Reysol in 1997.
He played many matches as right side midfielder from 1998 and the club won the champions 1999 J.League Cup.
He played many matches as right side back and right side midfielder and the club won the champions 2005 J1 League first league champions in the club history.
This biographical article related to a Japanese association football defender born in the 1970s is a stub.