福岡大学
Okubo was born in Nagasaki Prefecture on May 3, 1975. After graduating from Fukuoka University, he joined J1 League club Sanfrecce Hiroshima in 1998. Although he played as offensive midfielder, he could not play many matches for injury and behind Toshihiro Yamaguchi and Chikara Fujimoto. He retired end of 2000 season.