Career
Mizumaki played on the Japan Golf Tour, winning seven times. He also played on the Professional Golf Association Tour in 1994 and 1995. His best finish was a tie for second (playoff loss to Neal Lancaster) in the 1994 General Telephone and Electric Byron Nelson Golf Classic.
Japan Golf Tour wins 1989 Kanto Open Japan Professional Golf Association Senior Tour wins Dunhill Cup (representing Japan): 1993, 1994.
