Mayumi Hirase (Japanese: 平瀬真由美, born 30 October 1969) is a Japanese professional golfer who played on the LPGA of Japan Tour and the LPGA Tour.

Hirase won 18 times on the LPGA of Japan Tour between 1989 and 2000.

Hirase won once on the LPGA Tour^[1] in 1996.^[2]

• 1989 (3) Miyagi TV Cup Ladies Open, Ben Hogan & Itsuki Classic, JLPGA Lady Borden Cup
• 1990 (1) Fujisankei Ladies Classic
• 1991 (1) Marukoh Ladies
• 1992 (1) Mitsubishi Electric Ladies
• 1993 (3) World Ladies Golf Tournament, Kose-Junon Women's Open, Fujitsu Ladies
• 1994 (4) NEC Karuizawa 72, Takara World Invitational, Daio Paper Elleair Women's Open, JLPGA Meiji Dairies Cup
• 1995 (3) Toto Motors Ladies, Dunlop Twin Lakes Ladies Open, NEC Karuizawa 72
• 1996 (1) Toray Japan Queens Cup (co-sanctioned with LPGA Tour)
• 1999 (1) Daio Paper Elleair Ladies Open
• 2000 (1) Fujisankei Ladies Classic

Tournament in bold denotes major championships in LPGA of Japan Tour.

No.	Date	Tournament	Winning score	Margin of victory	Runner-up
1	2 Nov 1996	Toray Japan Queens Cup	–4 (70-70-72=212)	Playoff	Laura Davies

LPGA Tour playoff record (1–0)

No.	Year	Tournament	Opponent	Result
1	1996	Toray Japan Queens Cup	Laura Davies	Won with par on third extra hole

• Mayumi Hirase at the LPGA of Japan Tour official site