Gakumazawa Hideaki (嶽間沢秀明)

Place: Iwate, Japan

Rating: 2175.66, Std: 89.63, Rank: 492

First game: 2004-12-05, Last game: 2026-06-27

Top rating: 2215.83 (2017-07-02)

Games: 209, Wins: 100, Draws: 13, Losses: 96

Gy1: 19, Gy2: 32, Gy5: 55

40 Aomori Championship
Date	2026-06-27		Rating	2175.66
Round	Color	Result	Opponent
1	White	Loss	Shimura Hiroki	2257.37
2	White	Win	Kawaai Hitoshi	2063.06
3	White	Win	Tanno Yoshitaka	2034.70
4	White	Loss	Ishitani Shin-ichi	2347.14
5	Black	Win	Ooshina Seiichi	2003.15
64rd Meijinsen Qualification Tohoku area 1st round
Date	2026-05-16		Rating	2174.42
Round	Color	Result	Opponent
1	White	Win	Kawaai Hitoshi	2060.59
2	White	Loss	Miyamoto Syunju	2339.87
3	White	Win	Kusajima Masato	2261.33
4	Black	Win	Kawaai Hitoshi	2060.59
5	White	Loss	Miyamoto Syunju	2339.87
6	White	Loss	Kusajima Masato	2261.33
5th Masters Renju Tournament
Date	2026-01-25		Rating	2166.57
Round	Color	Result	Opponent
1	Black	Loss	Ishitani Shin-ichi	2356.10
2	Black	Loss	Iwano Fumio	2160.48
3	White	Loss	Miyamoto Syunju	2335.70
4	Black	Loss	Kawamura Norihiko	2540.63
5	Black	Draw	Kuga Akio	2407.52
41 Aomori Championship
Date	2025-11-29		Rating	2167.84
Round	Color	Result	Opponent
1	White	Win	Tanno Yoshitaka	2050.36
2	White	Win	Miyamoto Syunju	2324.86
3	Black	Win	Ooshina Seiichi	1978.63
39 Aomori Championship
Date	2025-06-28		Rating	2149.03
Round	Color	Result	Opponent
1	White	Win	Ooshina Seiichi	1973.82
2	White	Loss	Tanno Yoshitaka	2063.72
3	White	Loss	Kawaai Hitoshi	2066.72
4	White	Draw	Ishitani Shin-ichi	2372.56
5	White	Win	Miyamoto Syunju	2314.52
63rd Meijinsen Qualification Tohoku area 1st round
Date	2025-05-18		Rating	2143.86
Round	Color	Result	Opponent
1	White	Loss	Shimura Hiroki	2254.64
2	White	Draw	Kawaai Hitoshi	2067.06
4	White	Loss	Miyamoto Syunju	2314.69
5	Black	Draw	Kusajima Masato	2239.28
16th Tohoku Championship
Date	2025-03-09		Rating	2139.64
Round	Color	Result	Opponent
2	White	Loss	Ishitani Shin-ichi	2391.47
3	White	Loss	Shimura Hiroki	2247.81
4	Black	Draw	Kusajima Masato	2240.60
5	White	Win	Tamura Syougo	1768.85
38 Aomori Championship
Date	2024-06-29		Rating	2132.59
Round	Color	Result	Opponent
1	White	Win	Kawaai Hitoshi	2038.82
2	Black	Loss	Ishitani Shin-ichi	2417.38
3	White	Loss	Miyamoto Syunju	2355.10
5	White	Win	Tanno Yoshitaka	2061.12
62nd Meijinsen Qualification Tohoku area 1st round
Date	2024-05-19		Rating	2129.69
Round	Color	Result	Opponent
1	Black	Loss	Fujita Maiko	2432.74
2	White	Win	Shimura Hiroki	2168.53
3	Black	Loss	Miyamoto Syunju	2364.30
4	Black	Draw	Kusajima Masato	2270.91
5	Black	Win	Kawaai Hitoshi	2035.83
15th Tohoku Championship
Date	2024-03-31		Rating	2122.07
Round	Color	Result	Opponent
1	White	Loss	Ishitani Shin-ichi	2421.91
2	Black	Loss	Miyamoto Syunju	2367.48
3	Black	Loss	Kusajima Masato	2274.78
4	Black	Loss	Kawaai Hitoshi	2038.32
5	White	Loss	Fujita Maiko	2425.05
61th Meijinsen Qualification Tohoku area 1st round
Date	2023-05-21		Rating	2122.35
Round	Color	Result	Opponent
1	White	Loss	Inoue Fumiya	2535.92
2	White	Win	Kawaai Hitoshi	2053.57
4	Black	Loss	Kusajima Masato	2274.10
5	White	Draw	Miyamoto Syunju	2303.13
14th Tohoku Championship
Date	2023-02-19		Rating	2119.78
Round	Color	Result	Opponent
1	White	Win	Kawaai Hitoshi	2062.55
2	Black	Loss	Miyamoto Syunju	2279.66
3	White	Loss	Oomura Shu	2369.99
4	White	Loss	Kusajima Masato	2273.71
5	Black	Loss	Inoue Fumiya	2537.71
11th Tohoku Championship
Date	2019-10-06		Rating	2144.22
Round	Color	Result	Opponent
1	Black	Loss	Miyamoto Syunju	2299.04
2	White	Draw	Ishitani Shin-ichi	2383.56
3	Black	Win	Kusajima Masato	2245.38
4	Black	Loss	Hirono Masakazu	2057.56
5	Black	Loss	Okabe Hiroshi	2730.76
57 Meijinsen Qualification Tohoku area 1st round
Date	2019-04-07		Rating	2147.95
Round	Color	Result	Opponent
1	White	Draw	Miyamoto Syunju	2276.82
2	White	Loss	Kusajima Masato	2273.18
4	Black	Loss	Miyamoto Syunju	2276.82
5	White	Loss	Kusajima Masato	2273.18
35 Aomori Championship
Date	2018-07-01		Rating	2178.55
Round	Color	Result	Opponent
1	White	Win	Yamamoto Harue	1630.37
2	Black	Loss	Miyamoto Syunju	2265.98
3	Black	Loss	Tanno Yoshitaka	2136.28
56 Meijinsen Qualification Tohoku area 1st round
Date	2018-04-15		Rating	2194.64
Round	Color	Result	Opponent
2	White	Win	Miyamoto Syunju	2259.33
3	White	Win	Kusajima Masato	2310.68
4	Black	Win	Miyamoto Syunju	2259.33
5	Black	Loss	Kusajima Masato	2310.68
Aomori Meijinsen Tournament
Date	2017-11-05		Rating	2201.33
Round	Color	Result	Opponent
1	Black	Loss	Tanno Yoshitaka	2138.17
2	Black	Win	Ooshina Seiichi	2031.61
3	White	Win	Koseki Kenshou	1643.27
5	White	Loss	Miyamoto Syunju	2283.83
34 Aomori Championship
Date	2017-07-02		Rating	2215.83
Round	Color	Result	Opponent
1	Black	Win	Yamamoto Harue	1635.13
2	Black	Win	Koseki Kenshou	1653.86
3	White	Win	Kusajima Masato	2285.02
4	White	Win	Tanno Yoshitaka	2143.46
5	White	Win	Miyamoto Syunju	2275.01
55 Meijinsen Qualification Tohoku area 1st round
Date	2017-04-09		Rating	2210.07
Round	Color	Result	Opponent
1	White	Win	Miyamoto Syunju	2259.17
3	White	Loss	Kusajima Masato	2289.90
4	Black	Loss	Kusajima Masato	2289.90
5	White	Loss	Miyamoto Syunju	2259.17
54 Meijinsen Qualification Tohoku area 1st round
Date	2016-04-10		Rating	2210.77
Round	Color	Result	Opponent
1	White	Draw	Kusajima Masato	2267.81
2	White	Win	Miyamoto Syunju	2160.13
3	Black	Win	Miura Hitoshi	1776.50
32nd Aomori Championship
Date	2015-07-05		Rating	2193.11
Round	Color	Result	Opponent
1	White	Win	Ooshina Seiichi	2035.32
2	Black	Loss	Tanno Yoshitaka	2167.23
3	White	Win	Yamamoto Harue	1693.63
4	Black	Loss	Kobayashi Koichi	2287.50
5	White	Win	Koseki Kenshou	1688.68
7th Tohoku Championship
Date	2015-04-12		Rating	2192.59
Round	Color	Result	Opponent
1	Black	Loss	Okabe Hiroshi	2739.65
2	Black	Win	Miura Hitoshi	1792.33
3	Black	Loss	Ishitani Shin-ichi	2424.62
4	Black	Win	Miyamoto Syunju	2058.57
5	Black	Win	Kobayashi Koichi	2296.05
Sendai Memorial Cup
Date	2015-03-01		Rating	2188.59
Round	Color	Result	Opponent
1	Black	Win	Miura Hitoshi	1794.80
4	White	Loss	Kobayashi Koichi	2295.23
6	Black	Win	Miyamoto Syunju	2048.67
7	White	Win	Hirono Masakazu	1987.07
33th Aomori Meijinsen
Date	2014-11-09		Rating	2174.30
Round	Color	Result	Opponent
1	Black	Win	Shimoda Hiroyasu	1579.39
2	White	Loss	Kobayashi Koichi	2273.46
3	White	Win	Yamamoto Harue	1714.30
4	Black	Win	Koseki Kenshou	1702.47
5	Black	Loss	Tanno Yoshitaka	2168.33
6th Tohoku Championship
Date	2014-04-20		Rating	2164.42
Round	Color	Result	Opponent
1	White	Loss	Kusajima Masato	2236.88
2	White	Win	Kobayashi Koichi	2241.41
3	White	Win	Hirono Masakazu	1988.87
4	Black	Loss	Okabe Hiroshi	2759.48
5	Black	Win	Sato Kiyotomi	2470.61
7	Black	Loss	Miura Hitoshi	1803.34
32 Aomori Meijinsen
Date	2013-11-10		Rating	2149.21
Round	Color	Result	Opponent
1	White	Loss	Yamamoto Harue	1761.07
2	Black	Win	Koseki Kenshou	1695.86
3	White	Win	Miura Hitoshi	1794.97
4	White	Win	Chiba Tomio	1785.58
5	Black	Win	Tanno Yoshitaka	2157.05
5th Tohoku Championship
Date	2013-04-14		Rating	2131.67
Round	Color	Result	Opponent
1	Black	Loss	Okabe Hiroshi	2742.11
2	Black	Loss	Suzuki Rin	2051.71
3	White	Loss	Nakamura Shigeru	2867.24
4	Black	Win	Miura Hitoshi	1829.02
5	White	Loss	Kusajima Masato	2215.62
31st Aomori Meijinsen
Date	2012-11-10		Rating	2134.03
Round	Color	Result	Opponent
1	White	Win	Yamamoto Harue	1714.64
2	Black	Win	Kudou Shin-ichi	1889.68
3	Black	Win	Asari Katsuki	1721.53
4	Black	Win	Miura Hitoshi	1867.33
5	Black	Win	Tanno Yoshitaka	2151.29
30th Aomori Championship
Date	2012-07-01		Rating	2120.41
Round	Color	Result	Opponent
1	Black	Loss	Kudou Shin-ichi	1895.07
2	White	Win	Yamamoto Harue	1700.89
3	White	Draw	Kim Chang-Su	2038.13
4	Black	Win	Yokono Yoshiki	1854.91
5	White	Loss	Tanno Yoshitaka	2149.61
4th Tohoku Championship
Date	2012-04-08		Rating	2122.00
Round	Color	Result	Opponent
1	Black	Loss	Kudomi Takahiro	2430.31
2	Black	Loss	Ozawa Tetsushi	2061.60
3	White	Win	Suzuki Junichiro	1938.22
4	Black	Win	Maruta Hiroki	2086.76
5	Black	Draw	Kobayashi Koichi	2224.97
7th All Japan Championship
Date	2012-01-29		Rating	2122.39
Round	Color	Result	Opponent
1	Black	Loss	Ishitani Shin-ichi	2381.19
2	Black	Loss	Kamiya Shunsuke	2461.54
3	White	Win	Suzuki Rin	1995.32
4	Black	Loss	Kudomi Takahiro	2427.35
5	Black	Win	Fujikawa Masaki	2074.74
6	Black	Loss	Kon Akira	2020.38
30th Aomori-Meijinsen touranament
Date	2011-11-13		Rating	2125.75
Round	Color	Result	Opponent
1	Black	Win	Yamamoto Harue	1668.01
2	White	Win	Yamamoto Yuuichi	1716.89
3	Black	Win	Tsushima Norito	1692.27
4	Black	Win	Tanno Yoshitaka	2125.95
5	White	Win	Nara Tsurue	1808.31
29th Aomori Championship
Date	2011-07-03		Rating	2118.70
Round	Color	Result	Opponent
1	White	Win	Yamamoto Harue	1672.74
2	Black	Win	Tanno Yoshitaka	2113.28
3	Black	Loss	Yokono Yoshiki	1896.48
3rd Tohoku Championship
Date	2011-02-27		Rating	2115.09
Round	Color	Result	Opponent
1	White	Win	Yamamoto Harue	1686.60
2	Black	Win	Yokono Yoshiki	1894.69
3	Black	Loss	Miyagawa Sou	2122.40
4	Black	Loss	Fukui Nobuhiro	2392.51
5	Black	Win	Miura Hitoshi	1934.48
14th Mikami Cup Tournament
Date	2011-01-30		Rating	2114.60
Round	Color	Result	Opponent
S1	Black	Loss	Mitsumori Masao	2328.56
S3	White	Loss	Isobe Taizan	2408.82
S4	Black	Loss	Ishitani Shin-ichi	2393.37
S5	White	Loss	Ono Takayuki	2385.14
29th Aomori-Meijinsen Tournament
Date	2010-11-14		Rating	2119.42
Round	Color	Result	Opponent
1	Black	Win	Yokono Yoshiki	1900.72
2	Black	Win	Chiba Tomio	1749.78
3	Black	Win	Miura Hitoshi	1942.74
4	Black	Win	Yamamoto Harue	1700.33
5	Black	Loss	Tanno Yoshitaka	2097.23
2nd Tohoku Championship
Date	2010-03-14		Rating	2130.85
Round	Color	Result	Opponent
1	Black	Loss	Hirono Masakazu	1969.76
2	Black	Loss	Ishitani Shin-ichi	2397.83
3	Black	Win	Miura Hitoshi	1926.58
4	White	Win	Kobayashi Koichi	2132.45
5	White	Win	Seiryu Masanori	1987.59
28th Aomori-Meijinsen Tournament
Date	2009-11-01		Rating	2134.85
Round	Color	Result	Opponent
1	White	Win	Yamamoto Harue	1708.20
2	White	Loss	Tamada Yoichi	2405.24
3	White	Win	Chiba Tomio	1750.56
4	Black	Win	Yamamoto Yuuichi	1710.95
5	White	Loss	Miyagawa Sou	2135.81
8th Middle-dan Players Tournament
Date	2009-08-30		Rating	2139.64
Round	Color	Result	Opponent
1	Black	Win	Kobayashi Koichi	2132.35
2	Black	Loss	Koyama Jun	2444.99
3	Black	Loss	Maruyama Yasushi	2263.86
4	Black	Loss	Yamamoto Yasuhiro	2149.63
5	White	Loss	Kubo Izumi	2114.63
6	Black	Win	Kato Yasuhiro	2049.94
1st Tohoku Championship
Date	2009-02-22		Rating	2167.35
Round	Color	Result	Opponent
1	White	Win	Miura Hitoshi	1937.44
2	Black	Win	Sato Ryota	1525.88
3	Black	Loss	Ishitani Shin-ichi	2393.81
4	Black	Loss	Sato Kiyotomi	2452.74
5	Black	Loss	Tanno Yoshitaka	2119.80
12th Mikami Cup Tournament
Date	2009-01-18		Rating	2175.24
Round	Color	Result	Opponent
A1	Black	Win	Tamada Yoichi	2279.98
A2	White	Win	Tomobe Katsuhiro	2110.06
A3	Black	Win	Kobayashi Koichi	2116.35
A4	White	Win	Tanizaki Ryusuke	2131.26
A5	Black	Loss	Ono Takayuki	2410.90
7th 6-7 dan Tournament
Date	2008-09-28		Rating	2179.30
Round	Color	Result	Opponent
1	Black	Win	Kubo Izumi	2109.25
2	Black	Loss	Ono Takayuki	2410.15
3	Black	Loss	Kobayashi Koichi	2109.53
4	White	Win	Kato Yasuhiro	1997.76
5	White	Win	Tamura Kazumasa	2470.57
6	Black	Loss	Maruyama Yasushi	2234.93
6dan 7dan Tournament
Date	2007-10-08		Rating	2181.38
Round	Color	Result	Opponent
1	Black	Draw	Nagao Noriaki	2248.94
2	White	Win	Yamamoto Yasuhiro	2093.25
3	Black	Win	Kato Yasuhiro	1969.74
4	Black	Win	Ono Takayuki	2376.53
5	White	Loss	Sato Kiyotomi	2402.12
6	Black	Loss	Tamura Kazumasa	2408.00
5th 6-7 dan Tournament
Date	2004-12-05		Rating	2069.67
Round	Color	Result	Opponent
1	Black	Loss	Sato Kiyotomi	2368.22
2	Black	Win	Yamamoto Yasuhiro	2053.94
3	Black	Loss	Arita Nobuyoshi	2281.17
4	Black	Win	Tadokoro Hosai	1926.86
5	Black	Loss	Hiwatashi Kikuma	1951.43
6	White	Loss	Miyagawa Junzo	2255.76