Players › Osamu Nakamura

Osamu Nakamura

Player No.	143
Rank	9-dan
Date of birth	Nov 7, 1962
Birthplace	Tokyo
Teacher	Yoshimasa Saeki 9-dan

Junisen terms46

Career record239W-235L

Win rate0.504

Deviation score (FY2025)37.4

Best deviation score66.5
FY1985

Rating history and all games →

Junisen record

Term	Class	Rank	Record	Up/down	Deviation
85th term	Class C2	2	1W-4L
84th term	Class C1	31	1W-9L	Relegated	37.4
83rd term	Class C1	2	2W-8L	Demerit	29.1
82nd term	Class B2	14	3W-7L	Relegated	38.6
81st term	Class B2	24	5W-5L		47.2
80th term	Class B2	10	2W-8L	Demerit	45.1
79th term	Class B2	20	6W-4L	Demerit cleared	50.5
78th term	Class B2	23	4W-6L		47.9
77th term	Class B2	12	2W-8L	Demerit	38.6
76th term	Class B2	18	5W-5L		46.4
75th term	Class B2	16	4W-6L		52.0
74th term	Class B2	13	4W-6L		41.7
73rd term	Class B2	19	5W-5L		46.9
72nd term	Class B2	19	4W-6L		48.0
71st term	Class B2	2	3W-7L		47.0
70th term	Class B1	11	3W-9L	Relegated	51.5
69th term	Class B1	12	5W-7L		51.7
68th term	Class B2	6	8W-2L	Promoted	48.0
67th term	Class B2	7	7W-3L		47.8
66th term	Class B2	10	6W-4L		51.2
65th term	Class B2	17	6W-4L		42.3
64th term	Class B2	2	4W-6L		53.7
63rd term	Class B1	11	3W-9L	Relegated	49.3
62nd term	Class B1	7	3W-9L		50.8
61st term	Class B1	8	6W-5L		57.8
60th term	Class B1	6	5W-7L		52.8
59th term	Class B1	8	7W-5L		59.3
58th term	Class B1	6	5W-6L		45.8
57th term	Class B1	3	5W-6L		58.5
56th term	Class B1	13	7W-5L		56.2
55th term	Class B2	1	8W-2L	Promoted	62.5
54th term	Class B1	12	4W-8L	Relegated	51.7
53rd term	Class B2	2	9W-1L	Promoted	55.1
52nd term	Class B2	5	7W-3L		61.4
51st term	Class B2	4	7W-3L		64.2
50th term	Class B2	10	7W-3L		54.9
49th term	Class B2	5	5W-5L		57.7
48th term	Class B2	5	6W-4L		56.3
47th term	Class B2	11	7W-3L		57.5
46th term	Class B2	4	5W-5L		57.8
45th term	Class B2	11	8W-2L		59.8
44th term	Class B2	14	5W-5L		66.5
43rd term	Class B2	5	4W-6L		60.4
42nd term	Class B2	17	7W-3L		58.5
41st term	Class C1	16	9W-1L	Promoted	57.9
40th term	Class C2	25	10W-0L	Promoted	58.1

How the deviation score is calculated: see here.

Titles won

Osho-sen	2 terms (35th and 36th terms)

Ryuo-sen and Eio-sen from 2007 only; others are all-time records.

Terms in each class

Class B1	11 terms
Class B2	30 terms
Class C1	3 terms
Class C2	2 terms

Promotion history

Jan 23, 2008	9-dan
Oct 15, 1993	8-dan
Apr 1, 1986	7-dan
Apr 1, 1983	6-dan
Apr 1, 1982	5-dan
Jul 2, 1980	4-dan
1978	1-dan

Career win milestones

100 wins	Mar 30, 1984 Meisho-sen
200 wins	Jan 9, 1987 All-Japan Pro
300 wins	Jan 11, 1991 Junisen
400 wins	Mar 10, 1995 Junisen
500 wins	Jun 14, 2000 Kio-sen
600 wins	Nov 24, 2006 Junisen
700 wins	Jun 4, 2014 Ryuo-sen
800 wins	Aug 2, 2022 Oi-sen

Best wins (highest-rated opponents)

Dec 1, 2000	Takeshi Fujii 1937	Junisen
Oct 14, 2001	Koji Tanigawa 1934	Hayazashi-sen
Dec 14, 1990	Koji Tanigawa 1932	Osho-sen
Mar 19, 2001	Tadahisa Maruyama 1928	Ryuo-sen
Jan 27, 2000	Masataka Goda 1928	Ryuo-sen

Career wins and ratings are counted from the games recorded on this site (official games from FY1964, and Junisen games before that) and may differ from official records.

Frequent opponents

Michio Takahashi	11W-20L	Head-to-head
Makoto Nakahara	14W-15L	Head-to-head
Akira Shima	9W-20L	Head-to-head
Yoshikazu Minami	11W-18L	Head-to-head
Koji Tanigawa	8W-20L	Head-to-head
Torahiko Tanaka	14W-11L	Head-to-head
Taku Morishita	9W-16L	Head-to-head
Daisuke Nakagawa	14W-11L	Head-to-head
Hiroshi Kamiya	14W-9L	Head-to-head
Masaki Izumi	14W-8L	Head-to-head
Keiji Mori	14W-7L	Head-to-head
Hifumi Katoh	13W-7L	Head-to-head

Head-to-head with other players →