Due to club's financial problem, he was released along with Nobuyuki Kojima, Wagner Lopes, Hong Myung-bo and Yoshihiro Natsuka at the end of the 1998 season.
He was promoted to an assistant coach of the club's top team in the middle of the 2004 season and helped them to stay up at J1 League.
Although he managed in J1 first time in his career, Trinita results were bad and returned to J2 in 1 year.
In July 2015, Tasaka returned to J1 club Shimizu S-Pulse and became an assistant coach under manager Katsumi Oenoki.
In 2016, Tasaka signed with J2 club Matsumoto Yamaga FC and became a coach under manager Yasuharu Sorimachi.
In 2017, Tasaka moved to J3 League club Fukushima United FC and became a manager.