Okubo Ichigen

Okubo Ichigen (大窪一玄) has a rating of 1495.

Retired. The rating shown is the rating at retirement.

Okubo Ichigen大窪一玄Nihon Ki-in

Rating1495

Rank—

1-year change—

Peak rating—

Last 10156-136(1 by default)

1995 record: 0-1
Record since 1927: 156-136
Win rate: .534

Rating at retirement (not included in the rating list)

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

Professional ratings Find a player

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
Date	Opponent and tournament	Result	Change
February 9, 1995	Ushinohama SatsuoTengen　as White	Loss	↓14
May 17, 1993	Kataoka SatoshiRyusei　as Black	Loss	↓2
January 14, 1993	Fujisawa ShukoTengen 2nd Preliminary　as White	Loss	↓4
May 18, 1992	Honda KunihisaRyusei　as White	Loss	↓6
March 12, 1992	Honda KunihisaTengen Round 1　as Black	Loss	↓9
June 23, 1988	Kuroda YukioOza 2nd Preliminary　as White	Win	↑10
April 19, 1988	Rui NaiweiJapan-China Go Exchange Round 4　as Black	Loss	—
March 31, 1988	Ishida YoshioHoninbo 2nd Preliminary　as Black	Loss	↓4
July 9, 1987	Fujisawa ShukoHoninbo 3rd Preliminary　as White	Loss	↓6
December 11, 1986	Tsuchida MasamitsuKisei 9 dan Section　as Black	Loss	↓16
July 10, 1986	Kuroda YukioGosei Preliminary　as Black	Win	↑12
March 13, 1986	Yamashiro HiroshiKisei 9 dan Section　as Black	Loss	↓4
December 12, 1985	Ishii KunioKisei 9 dan Section　as Black	Win	↑24
July 10, 1985	Takemiya MasakiMeijin 2nd Preliminary　as Black	Loss	↓2
December 6, 1984	Sakakibara ShojiKisei 9 dan Section　as White	Loss	↓14
March 22, 1984	Hane YasumasaKisei 9 dan Section　as Black	Loss	↓5
February 23, 1984	Hashimoto YoshimiKisei 9 dan Section　as Black	Win	↑15
February 2, 1984	Fujisawa HosaiKisei 9 dan Section　as White	Win	↑25
April 28, 1983	Nakamura YutaroOza 2nd Preliminary　as Black	Win	↑9
February 3, 1983	Tainaka ShinKisei 9 dan Section　as White	Loss	↓16

Head-to-head

Up to 10 opponents, most-played first. Records are from Okubo Ichigen'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
Fujisawa Hosai	3-6.333	2-4	1-2
Nakamura Yutaro	6-1.857	4-1	2-0
Hayashi Yutaro	3-4.429	1-2	2-2
Takagawa Shukaku	1-6.143	0-3	1-3
Magari Reiki	2-4.333	1-3	1-1
Hashimoto Yoshimi	3-3.500	1-2	2-1
Hoshino Toshi	6-01.000	1-0	5-0
Sakata Eio	0-5.000	0-4	0-1
Kano Yoshinori	3-2.600	2-0	1-2
Fujisawa Shuko	2-3.400	1-1	1-2
Ishige Kakuo	4-1.800	0-1	4-0
Iwamoto Kaoru	2-3.400	1-0	1-3
Hashimoto Utaro	3-2.600	2-0	1-2
Sakakibara Shoji	2-3.400	1-1	1-2
Seo Hisashi	3-2.600	3-0	0-2
Otake Hideo	3-2.600	1-1	2-1
Sugiuchi Masao	1-4.200	1-2	0-2
Maeda Nobuaki	2-3.400	1-2	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
1995	0-1	.000
1993	0-2	.000
1992	0-2	.000
1988	1-2	.333
1987	0-1	.000
1986	1-2	.333
1985	1-1	.500
1984	2-2	.500
1983	2-1	.667
1982	0-1	.000
1981	0-2	.000
1980	0-2	.000
1979	1-1	.500
1978	5-6	.455
1977	1-2	.333
1976	3-5	.375
1975	5-3	.625
1974	4-5	.444
1973	7-6	.538
1972	2-6	.250
1971	5-5	.500
1970	7-4	.636
1969	5-5	.500
1968	5-9	.357
1967	12-5	.706
1966	5-6	.455
1965	13-10	.565
1964	11-11	.500
1963	19-8	.704
1962	16-7	.696
1961	10-6	.625
1960	11-4	.733
1959	1-1	.500
1957	0-1	.000
1952	1-1	.500
Total	156-136	.534

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