Ō Rissei (; born 7 November 1958) is a professional Go player in Japan.
Rissei was born in Taiwan and moved to Japan when he was 13 years old; he would become professional the following year. His instructor is Kano Yoshinori, while he is the instructor of his daughter O Keii, professional 2 dan.
Titles and runners-up Ranks #10-t in total number of titles in Japan.
DomesticTitle Wins Runners-up Kisei 3 (2000–2002) 1 (2003) Meijin 1 (1998) Honinbo 1 (1998) Judan 4 (2001–2004) 2 (1996, 2005) Oza 4 (1995, 1998–2000) 2 (1996, 2001) Agon Cup 1 (1994) 1 (2001) NHK Cup 1 (1997) 2 (1988, 2003) Shinjin-O 1 (1981) 1 (1986) NEC Cup 3 (1989, 1998, 2002) Kakusei 4 (1989, 1993, 1999, 2000) 1 (1990) Hayago Championship 2 (1992, 1997) Shin-Ei 1 (1983) Prime Minister Cup 1 (1980) Total 19 18Continental Asian TV Cup 1 (1997) Total 0 1International LG Cup 1 (1998) Chunlan Cup 1 (2000) 1 (2001) Fujitsu Cup 2 (1992, 1997) Zhonghuan Cup 1 (2004) Total 2 4Career total Total 21 23
External links GoBase Profile Nihon Ki-in Profile (Japanese)