[1] Mizumaki, graduate of Hosei University,[1] played on the Japan Golf Tour, winning seven times.

His best finish was a tie for second (playoff loss to Neal Lancaster) in the 1994 GTE Byron Nelson Golf Classic.

[2] *Note: The 1994 Pocari Sweat Open was shortened to 54 holes due to weather.

Japan Golf Tour playoff record (1–0) PGA Tour playoff record (0–1) CUT = missed the half-way cut "T" = tied Note: Mizumaki only played in The Open Championship.

This biographical article relating to golf in Japan is a stub.