After retirement, Tanaka started coaching career at NKK in 1989. In 1993, he became a manager for Japan U-20 national team. At 1995 World Youth Championship, he led U-20 Japan to advanced to the quarter-finals. In 1995, he signed with Nagoya Grampus Eight and became a coach. In November 1997, he became a manager as Carlos Queiroz successor. He was sacked in April 1999. In 2001, he signed with J2 League club Shonan Bellmare and managed the club until 2002. He is currently the bullpen catcher for the Miami Marlins.