Sagawa Express
After retirement, Tanaka became a manager for Sagawa Express Tokyo (later "Sagawa Shiga") in 2005. He managed the club in 2 seasons. In 2007, Sagawa Express Tokyo became new team; "Sagawa Shiga" merged with Sagawa Express Osaka. Then he became a coach for Sagawa Shiga. In 2008, he became a manager for the club. However the club results were bad and he was sacked in October.