| O Rissei | |
| Fullname: | Rissei Ō |
| Chinese: | 王立誠 |
| Pinyin: | Wáng Lìchéng |
| Birth Date: | 1958 11, df=yes |
| Birth Place: | Taiwan |
| Residence: | Tokyo, Japan |
| Teacher: | Kano Yoshinori |
| Turnedpro: | 1972 |
| Rank: | 9 dan |
| Affiliation: | Nihon Ki-in
|
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.
Ranks #10-t in total number of titles in Japan.
| Domestic | |||
|---|---|---|---|
| Title | Wins | Runners-up | |
| 3 (2000–2002) | 1 (2003) | ||
| 1 (1998) | |||
| 1 (1998) | |||
| 4 (2001–2004) | 2 (1996, 2005) | ||
| 4 (1995, 1998–2000) | 2 (1996, 2001) | ||
| 1 (1994) | 1 (2001) | ||
| 1 (1997) | 2 (1988, 2003) | ||
| 1 (1981) | 1 (1986) | ||
| 3 (1989, 1998, 2002) | |||
| 4 (1989, 1993, 1999, 2000) | 1 (1990) | ||
| 2 (1992, 1997) | |||
| 1 (1983) | |||
| 1 (1980) | |||
| Total | 19 | 18 | |
| Continental | |||
| 1 (1997) | |||
| Total | 0 | 1 | |
| International | |||
| 1 (1998) | |||
| 1 (2000) | 1 (2001) | ||
| 2 (1992, 1997) | |||
| 1 (2004) | |||
| Total | 2 | 4 | |
| Career total | |||
| Total | 21 | 23 | |