Players › Noboru Kosaka

Noboru Kosaka

Player No.	112
Rank	8-dan
Date of birth	Feb 18, 1950
Birthplace	Hyogo
Teacher	藤内金吾8-dan (deceased)

Junisen terms30

Career record143W-157L

Win rate0.477

Deviation score (FY2004)31.3

Best deviation score54.7
FY1987

Rating history and all games →

Junisen record

Term	Class	Rank	Record	Up/down	Deviation
63rd term	Class C2	32	2W-8L	Relegated	31.3
62nd term	Class C2	37	4W-6L		38.9
61st term	Class C2	13	2W-8L	Demerit	29.2
60th term	Class C2	35	6W-4L	Demerit cleared	45.0
59th term	Class C2	27	3W-7L	Demerit	43.4
58th term	Class C2	31	5W-5L	△	39.1
57th term	Class C2	22	4W-6L	△	41.5
56th term	Class C2	32	5W-5L	△	46.0
55th term	Class C2	23	4W-6L	△	48.2
54th term	Class C2	26	5W-5L	△	44.0
53rd term	Class C2	39	5W-5L	△	44.4
52nd term	Class C2	27	3W-7L	△	42.4
51st term	Class C2	51	5W-5L	△	48.4
50th term	Class C2	40	1W-9L	Demerit	31.2
49th term	Class C2	19	3W-7L		44.2
48th term	Class C2	26	6W-4L		46.8
47th term	Class C2	14	5W-5L		46.2
46th term	Class C2	7	6W-4L		54.7
45th term	Class C2	2	7W-3L		46.5
44th term	Class C2	25	8W-2L		52.2
43rd term	Class C2	16	4W-6L		44.0
42nd term	Class C2	16	6W-4L		51.3
41st term	Class C2	5	5W-5L		46.4
40th term	Class C2	7	7W-3L		47.0
39th term	Class C2	9	6W-4L	△	50.7
38th term	Class C2	9	5W-5L	△	42.6
37th term	Class C2	28	6W-4L	△	53.6
36th term	Class C2	6	3W-7L	Demerit	38.6
30th term	Class C2	7	6W-4L		53.3
29th term	Class C2	12	6W-4L		49.1

How the deviation score is calculated: see here.

Terms in each class

Class C2	30 terms

Promotion history

Apr 1, 2020	8-dan
Sep 28, 1999	7-dan
Jul 9, 1987	6-dan
Nov 17, 1980	5-dan
Oct 1, 1973	4-dan
1965	1-dan

Career win milestones

100 wins	May 6, 1980 Kisei-sen
200 wins	Jan 10, 1986 Judan-sen
300 wins	Mar 4, 1993 NHK Cup
400 wins	May 2, 2002 Kisei-sen

Best wins (highest-rated opponents)

Jun 18, 1975	Kunio Naitou 1833	Hayazashi-sen
Oct 24, 1978	Hidemitsu Moriyasu 1830	Shinjin-o-sen
Oct 31, 1978	Hidemitsu Moriyasu 1823	Shinjin-o-sen
Sep 14, 1988	Kiyozumi Kiriyama 1821	Oi-sen
Sep 17, 1987	Yoshikazu Minami 1819	Oi-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

Toshiyuki Tsubouchi	19W-17L	Head-to-head
Kazuo Azuma	16W-10L	Head-to-head
Kouichi Kodama	11W-15L	Head-to-head
Kaishu Tanaka	9W-16L	Head-to-head
Masakazu Wakamatsu	10W-12L	Head-to-head
Kenji Waki	8W-14L	Head-to-head
Akira Kinoshita	16W-5L	Head-to-head
Hirofumi Itoh	10W-11L	Head-to-head
Masayuki Moriyasu	15W-4L	Head-to-head
Nobuo Mori	9W-10L	Head-to-head
Keiji Nishikawa	8W-11L	Head-to-head
Kozo Arimori	1W-18L	Head-to-head

Head-to-head with other players →