One of Ohsako"s JLPGA wins was co-sanctioned with the LPGA Tour, the 1978 Mizuno-Japan Classic. LPGA of Japan Tour wins (10) 1975 (1) Lake Towada International Women"s Open LPGA Tour wins (1) Professional Handa Cup (representing World team): 2006, 2007, 2008, 2009.
1975 (1) Lake Towada International Women"s Open 1976 (1) Taisetsu Women"s Open 1977 (1) Miyagi television Cup Women"s Open 1978 (1) Mizuno-Japan Classic (co-sanctioned with LPGA Tour) 1981 (1) West Sea National Park Women"s Open 1983 (1) Hiroshima Women"s Open 1986 (1) UCC Ladies 1989 (1) Mitsubishi Electric Infantas Ladies 1992 (1) Kosaido Asahi Golf Cup 1995 (1) Daio Paper Elleair Women"s Open LPGA Tour playoff record (1–0).
