O Rissei

O Rissei (王立誠) has a rating of 1818, ranked 74 of 452 in professional play. Their highest rating so far is 2036 (October 1, 2009).

O Rissei9 dan王立誠Nihon Ki-in Tokyo

Rating1818

Rank74

1-year change↓53

Peak rating2036

Last 10937-656

2026 record: 9-13
Record since 1927: 937-656(2 no result)
Win rate: .588

The rating is calculated from published game results. It does not include any adjustment for playing Black.

Professional ratings Find a player

Rating history — professional

1 year3 years5 yearsAll

28 gamesHigh 1928Low 1818

83 gamesHigh 1928Low 1751

127 gamesHigh 1928Low 1751

636 gamesHigh 2036Low 1736

The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
Date	Opponent and tournament	Result	Change
August 20, 2026	Murakawa DaisukeKisei League B1　as Black	Loss	↓5
July 30, 2026	Yoda OzoraHoninbo　Colors unknown	Loss	↓25
July 13, 2026	Ueno AsamiJudan Preliminary A Final　as Black	Loss	↓10
July 9, 2026	Rin KanketsuHoninbo　Colors unknown	Win	↑21
July 2, 2026	Koike YoshihiroKisei League B1　as Black	Loss	↓7
June 22, 2026	Fukuoka KotaroKisei League B1　as White	Loss	↓4
June 15, 2026	Chang FukangGosei　Colors unknown	Loss	↓22
June 8, 2026	Kataoka SatoshiJudan Preliminary A　as Black	Win	↑7
May 18, 2026	Adachi ToshimasaKisei League B1　as Black	Loss	↓11
May 7, 2026	Takeshita RyoyaGosei　Colors unknown	Win	↑9
April 30, 2026	Yoda NorimotoHoninbo　Colors unknown	Win	↑14
April 26, 2026	Koyama KuyaNHK Cup Round 1　as White	Loss	↓10
April 20, 2026	Sun ZheKisei League B1　as White	Loss	↓13
April 13, 2026	Cho ChikunTeikei Cup Legend Round 2　as Black	Loss	↓20
April 6, 2026	Kasai KojiGosei　Colors unknown	Win	↑1
April 2, 2026	Kazama JunMeijin　Colors unknown	Loss	↓25
March 30, 2026	Hirata TomoyaKisei League B1　as White	Loss	↓9
March 2, 2026	Fukui MasaakiGosei　Colors unknown	Win	↑1
February 19, 2026	Kobayashi KoichiTeikei Cup Legend Round 1　as White	Win	↑7
February 12, 2026	Muramoto WataruKisei League B1　as Black	Win	↑18

Head-to-head

Up to 10 opponents, most-played first. Records are from O Rissei's point of view; jigo and no-result games are not counted as wins or losses. Only games from 1927 onward are included.
Opponent	Total	As Black	As White
Cho Chikun	38-45.458	18-20	20-24
Kobayashi Koichi	22-24.478	7-15	13-9
Yoda Norimoto	17-27.386	11-11	5-15
Kobayashi Satoru	27-17.614	14-9	9-8
Kato Masao	18-21.462	6-13	11-8
O Meien	23-16.590	14-9	7-6
Takemiya Masaki	21-14.600	11-6	10-8
Rin Kaiho	25-9.735	14-5	11-4
Ryu Shikun	15-17.469	6-9	8-8
Kataoka Satoshi	16-14.533	10-6	6-8
Cho Sonjin	9-18.333	5-6	3-10
Hane Naoki	8-16.333	3-7	4-7
Yamada Kimio	14-9.609	6-6	8-2
Takao Shinji	9-13.409	6-3	2-10
Yamashiro Hiroshi	12-10.545	4-7	6-3
Otake Hideo	12-10.545	9-5	3-5
Cho U	6-16.273	4-8	2-8
Mizokami Tomochika	11-9.550	5-1	4-5
Hikosaka Naoto	15-5.750	9-3	6-2
Yamashita Keigo	4-16.200	3-5	1-10
Yuki Satoshi	13-6.684	5-3	8-3
Ishida Yoshio	8-10.444	4-2	3-8
Imamura Toshiya	9-7.563	5-4	4-2
Awaji Shuzo	9-6.600	7-2	1-4
Mimura Tomoyasu	7-7.500	3-2	2-3
Honda Kunihisa	11-3.786	5-2	6-1
Miyazawa Goro	10-4.714	3-3	7-1
Komatsu Hideki	6-8.429	2-2	4-4
Iyama Yuta	2-11.154	0-7	2-3
Fujisawa Shuko	8-4.667	4-2	4-2
Akiyama Jiro	6-5.545	3-5	2-0
Ogata Masaki	7-3.700	1-2	6-1
Kamimura Haruo	8-2.800	5-1	2-1
Sun Zhe	3-7.300	0-1	1-5
Michael Redmond	9-1.900	3-1	4-0
Sakata Eio	5-4.556	2-1	3-3
Tsuruyama Atsushi	4-5.444	2-2	0-2
So Yokoku	3-6.333	1-3	2-2
Oba Junya	5-4.556	1-0	3-2
Rin Kanketsu	4-5.444	2-1	1-2
Kono Rin	7-2.778	4-2	1-0
Ishida Akira	9-01.000	3-0	6-0
Hashimoto Shoji	6-3.667	4-3	2-0
Seto Taiki	4-5.444	4-2	0-3
Fukui Masaaki	6-2.750	1-1	3-1
Kono Takashi	5-3.625	2-2	1-1
Kato Atsushi	5-3.625	1-0	2-2
Nakano Hironari	5-2.714	1-2	3-0
Kudo Norio	5-2.714	1-2	3-0
Mochizuki Kenichi	5-2.714	2-1	2-1
Yo Kagen	4-3.571	1-2	3-1
Nakamura Hidehito	6-1.857	1-0	4-1
Oya Koichi	7-01.000	3-0	3-0
Han Zenki	5-2.714	2-0	2-1
Okuda Aya	7-01.000	4-0	1-0
Kiyonari Tetsuya	4-3.571	2-1	2-2
Nakaonoda Tomomi	6-1.857	3-0	2-1
Iguchi Toyohide	5-1.833	2-0	2-0
Imamura Yoshiaki	5-1.833	2-0	3-1
Sakai Hideyuki	2-4.333	1-0	0-3
Kamimura Kunio	4-2.667	2-1	2-1
Kanda Ei	5-1.833	1-1	2-0
Kim Sujun	2-4.333	1-3	1-1
Kono Mitsuki	2-4.333	0-1	2-0
Rin Shien	3-2.600	1-0	2-2
Nakane Naoyuki	3-2.600	0-1	2-0
Moriyama Naoki	4-1.800	3-1	1-0
Hasegawa Sunao	5-01.000	4-0	1-0
Sonoda Yuichi	3-2.600	1-0	2-2
Hane Yasumasa	5-01.000	1-0	4-0
Kuwabara Shun	3-2.600	0-0	2-0
Shuto Shun	3-2.600	1-2	0-0
Ogaki Yusaku	4-1.800	0-0	4-1
Yamada Takuji	1-4.200	0-3	1-0
Kori Toshio	4-1.800	1-1	3-0
Sanno Hirotaka	4-1.800	2-0	1-1
Mitani Tetsuya	0-5.000	0-2	0-1
Lee Ishu	2-3.400	1-2	1-1
Ishigure Ikuro	4-1.800	1-1	2-0
Sakaguchi Ryuzo	4-1.800	2-0	2-1
Kanazawa Hideo	2-3.400	0-1	1-1

Record by year

Counted by calendar year, January to December (default wins and losses are included; jigo and no-result games are not). Only games from 1927 onward are counted, so these totals do not match the career records published by the two Ki-in.

Year	Record	Win rate
2026	9-13	.409
2025	27-10	.730
2024	10-8	.556
2023	12-14	.462
2022	15-9	.625
2021	12-9	.571
2020	13-9	.591
2019	15-11	.577
2018	18-11	.621
2017	18-17	.514
2016	24-15	.615
2015	26-10	.722
2014	13-11	.542
2013	17-10	.630
2012	23-14	.622
2011	13-15	.464
2010	11-19	.367
2009	28-13	.683
2008	28-13	.683
2007	23-15	.605
2006	23-24	.489
2005	25-23	.521
2004	19-25	.432
2003	31-24	.564
2002	22-27	.449
2001	28-23	.549
2000	32-18	.640
1999	24-18	.571
1998	37-23(2 no result)	.617
1997	32-19	.627
1996	23-23	.500
1995	33-10	.767
1994	20-14	.588
1993	26-15	.634
1992	23-11	.676
1991	28-11	.718
1990	15-8	.652
1989	9-11	.450
1988	12-12	.500
1987	17-12	.586
1986	19-9	.679
1985	11-8	.579
1984	13-6	.684
1983	10-10	.500
1982	12-8	.600
1981	9-3	.750
1980	9-6	.600
1979	2-2	.500
1978	9-3	.750
1977	2-0	1.000
1976	7-3	.700
1975	0-1	.000
Total	937-656(2 no result)	.588

Calculated from games played between 1927 and 2026 (as of September 17, 2026).