Koyama Jun (小山純)

Place: Tokyo, Japan

Rating: 2581.05, Std: 191.81, Rank: 63

First game: 2003-09-21, Last game: 2022-05-22

Top rating: 2642.44 (2015-11-15)

Games: 349, Wins: 200, Draws: 35, Losses: 114

Gy1: 0, Gy2: 0, Gy5: 4

60th Meijinsen Qualification Kanto area 1st round
Date	2022-05-22		Rating	2581.05
Round	Color	Result	Opponent
1	White	Win	Tomobe Katsuhiro	2127.36
2	White	Win	Maruta Hiroki	2203.20
3	Black	Draw	Fujita Maiko	2414.86
4	Black	Draw	Yokoyama Shota	2451.46
57 Meijinsen Tournament
Date	2019-09-16		Rating	2606.10
Round	Color	Result	Opponent
1	Black	Draw	Inoue Fumiya	2416.27
2	White	Loss	Kamiya Shunsuke	2821.21
3	Black	Loss	Kawamura Norihiko	2660.21
4	White	Win	Matsuura Hiroshi	2363.16
5	Black	Loss	Nakayama Tomoharu	2823.91
6	White	Loss	Kawano Takahisa	2455.61
7	White	Loss	Hasegawa Kazuto	2609.50
8	White	Win	Okabe Hiroshi	2723.17
9	Black	Win	Ishitani Shin-ichi	2381.30
World Championship 2019, AT
Date	2019-08-10		Rating	2612.15
Round	Color	Result	Opponent
1	Black	Draw	Mei Fan	2703.50
2	Black	Win	Oll Aivo	2744.57
3	Black	Win	Inoue Fumiya	2420.45
4	Black	Win	Epifanov Dmitry	2671.87
5	Black	Loss	Nakayama Tomoharu	2818.50
6	Black	Win	Okabe Hiroshi	2718.60
7	Black	Draw	Kamiya Shunsuke	2818.39
8	Black	Draw	Gardström Petter	2701.41
9	White	Loss	Fedotov Denis	2681.25
10	White	Loss	Cao Dong	2780.06
11	Black	Loss	Sushkov Vladimir	2840.60
World Championship 2019, QT
Date	2019-08-02		Rating	2612.07
Round	Color	Result	Opponent
1	White	Win	Sandstrom Richard	2375.29
2	White	Win	Li Xiaoqing	2657.15
3	Black	Loss	Mesila Villem	2667.13
4	Black	Win	Wai Chan Keong	2784.21
5	Black	Draw	Fedotov Denis	2683.91
6	White	Loss	Gardström Petter	2703.06
7	White	Win	Topkin Georg-Romet	2628.19
57 Meijinsen Qualification East Japan area 2nd round
Date	2019-06-23		Rating	2605.77
Round	Color	Result	Opponent
1	Black	Win	Maruta Hiroki	2184.81
2	Black	Win	Maruta Koji	2140.34
3	White	Win	Inoue Fumiya	2423.97
4	Black	Win	Kusajima Masato	2257.81
5	White	Win	Ono Takayuki	2397.32
14th All Japan Championship
Date	2019-03-31		Rating	2585.47
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2287.05
2	Black	Win	Chigira Makoto	2090.42
3	White	Draw	Inoue Fumiya	2424.75
4	White	Win	Ono Takayuki	2395.96
5	Black	Loss	Nakamura Shigeru	2993.15
6	Black	Loss	Okabe Hiroshi	2698.02
19 Renju Emperor Tournament Kanto area 1st round
Date	2018-10-21		Rating	2567.82
Round	Color	Result	Opponent
1	Black	Win	Demachi Koichiro	1924.07
2	White	Loss	Iwano Fumio	2247.14
3	White	Draw	Ishitani Shin-ichi	2424.29
4	White	Loss	Inoue Fumiya	2403.54
56 Meijinsen Tournament
Date	2018-09-17		Rating	2570.72
Round	Color	Result	Opponent
1	Black	Win	Kuga Akio	2422.48
2	Black	Loss	Matsuura Hiroshi	2353.90
3	White	Win	Okabe Hiroshi	2700.05
5	Black	Win	Kawamura Norihiko	2653.15
6	Black	Loss	Ishitani Shin-ichi	2427.08
7	Black	Loss	Kamiya Shunsuke	2797.26
8	White	Loss	Nakamura Shigeru	2998.05
9	White	Win	Hasegawa Kazuto	2575.60
35 Kanto Championship
Date	2018-07-16		Rating	2573.76
Round	Color	Result	Opponent
4	Black	Loss	Sato Kiyotomi	2441.53
5	White	Win	Iwano Fumio	2248.13
6	White	Win	Fujikawa Masaki	2100.62
56 Meijinsen Qualification East Japan area 2nd round
Date	2018-06-25		Rating	2575.91
Round	Color	Result	Opponent
1	White	Win	Kusajima Masato	2306.30
2	Black	Win	Sato Kiyotomi	2442.18
3	White	Loss	Ono Takayuki	2389.88
56 Meijinsen Qualification Kanto area 1st round
Date	2018-05-13		Rating	2581.52
Round	Color	Result	Opponent
1	Black	Loss	Mitsumori Masao	2331.57
2	Black	Win	Iwano Fumio	2257.55
3	Black	Win	Maruta Hiroki	2153.69
4	White	Win	Sato Kiyotomi	2441.49
Team World Championship 2018
Date	2018-05-05		Rating	2582.81
Round	Color	Result	Opponent
1	Black	Win	Lillemaa Argo	2196.94
2	Black	Win	Purk Andry	2634.53
4	White	Win	Kachaev Denis	2542.36
5	Black	Win	Nikonov Konstantin	2692.28
6	Black	Win	Liu Yang	2635.27
7	White	Win	Lavrik-Karmazin Maksim	2498.96
8	White	Draw	Artemyev Sergey	2577.48
9	Black	Loss	Liu Yang	2635.27
10	White	Loss	Purk Andry	2634.53
13th All Japan Championship
Date	2018-01-28		Rating	2578.47
Round	Color	Result	Opponent
1	White	Loss	Ono Takayuki	2383.11
2	White	Loss	Ishitani Shin-ichi	2416.74
3	White	Loss	Miyamoto Syunju	2267.47
5	White	Win	Sato Kiyotomi	2432.90
6	Black	Win	Maruta Hiroki	2146.19
18 Kanto Renju Emperor Tournament 2nd round
Date	2017-12-17		Rating	2585.69
Round	Color	Result	Opponent
1	Black	Draw	Sato Kiyotomi	2435.81
2	Black	Win	Miyamoto Syunju	2273.29
3	Black	Loss	Nakamura Shigeru	2959.16
4	Black	Loss	Okabe Hiroshi	2718.96
5	White	Win	Kusajima Masato	2302.55
18 Kanto Renju Emperor Tournament 1st round
Date	2017-11-01		Rating	2595.23
Round	Color	Result	Opponent
1	Black	Win	Koyama Akihiro	1964.05
2	White	Draw	Okabe Hiroshi	2720.51
3	Black	Win	Ono Takayuki	2378.14
4	White	Win	Kusajima Masato	2298.73
World Championship 2017, BT
Date	2017-08-12		Rating	2606.85
Round	Color	Result	Opponent
1	Black	Win	Rahumägi Brenet	2329.86
2	Black	Win	Sun In	2433.21
3	Black	Draw	Liu Yang	2670.76
4	Black	Win	Lan Zhiren	2637.34
5	Black	Win	Yang Yu-Hsiung	2431.43
6	Black	Loss	Tang Kai Lam	2771.19
7	Black	Win	Topkin Georg-Romet	2524.61
8	White	Win	Huang Yen-Hua	2461.01
9	Black	Loss	Okabe Hiroshi	2720.01
World Championship 2017, QT
Date	2017-08-05		Rating	2606.76
Round	Color	Result	Opponent
1	White	Win	Rahumägi Brenet	2329.71
2	White	Win	Sushkov Vladimir	2874.95
3	Black	Loss	Lan Zhiren	2636.48
4	Black	Loss	Mei Fan	2696.00
5	White	Draw	Okabe Hiroshi	2720.10
6	Black	Win	Kim Su Chan	2307.23
7	Black	Win	Lu Wei-Yuan	2602.67
55 Meijinsen Qualification East Japan area 2nd round
Date	2017-06-11		Rating	2600.19
Round	Color	Result	Opponent
1	Black	Win	Tomobe Katsuhiro	2161.70
2	White	Loss	Tamada Yoichi	2537.89
3	White	Loss	Ono Takayuki	2375.89
4	Black	Win	Miyamoto Syunju	2270.32
5	Black	Loss	Sato Kiyotomi	2470.36
12th All Japan Championship
Date	2017-03-26		Rating	2606.79
Round	Color	Result	Opponent
1	Black	Win	Kusajima Masato	2287.67
2	Black	Loss	Nakamura Shigeru	2965.78
3	Black	Win	Ishitani Shin-ichi	2393.85
4	Black	Win	Nakayama Tomoharu	2794.01
5	Black	Loss	Kamiya Shunsuke	2788.45
6	White	Loss	Tachi Masaya	2530.02
20 New Year (Mikami) Cup
Date	2017-01-22		Rating	2611.29
Round	Color	Result	Opponent
S2	Black	Win	Sato Kiyotomi	2491.65
S3	Black	Loss	Nakamura Shigeru	2964.11
S4	Black	Win	Ishitani Shin-ichi	2393.86
S5	Black	Loss	Okabe Hiroshi	2719.25
17 Kanto Renju Emperor Tournament 1st round
Date	2016-11-23		Rating	2614.96
Round	Color	Result	Opponent
1	Black	Win	Demachi Koichiro	1932.63
2	Black	Loss	Okabe Hiroshi	2713.67
3	Black	Win	Iwano Fumio	2269.77
4	White	Win	Ishitani Shin-ichi	2400.46
54 Meijinsen Tournament
Date	2016-09-19		Rating	2618.92
Round	Color	Result	Opponent
1	White	Win	Matsuura Hiroshi	2361.78
2	Black	Loss	Kamiya Shunsuke	2760.19
3	White	Draw	Hasegawa Kazuto	2639.23
4	White	Draw	Iio Yoshihiro	2561.10
5	Black	Win	Tanaka Toshiki	2443.58
6	Black	Draw	Nakayama Tomoharu	2777.87
7	Black	Draw	Maruyama Yasushi	2291.18
8	Black	Win	Kuga Akio	2366.86
9	White	Loss	Okabe Hiroshi	2718.19
33 Kanto Championship
Date	2016-07-31		Rating	2623.25
Round	Color	Result	Opponent
1	White	Win	Kato Yasuhiro	2044.25
2	Black	Loss	Nakamura Shigeru	2955.21
3	Black	Loss	Okabe Hiroshi	2722.38
4	Black	Win	Nakamura Souta	2275.49
5	Black	Draw	Nakayama Tomoharu	2776.79
6	Black	Draw	Ishitani Shin-ichi	2387.52
54 Meijinsen Qualification East Japan area 2nd round
Date	2016-06-12		Rating	2629.81
Round	Color	Result	Opponent
1	White	Win	Kusajima Masato	2267.88
2	Black	Win	Kamiya Shunsuke	2727.51
3	White	Win	Tamada Yoichi	2569.09
4	Black	Draw	Mitsumori Masao	2354.10
5	White	Draw	Okabe Hiroshi	2724.67
19 Mikami Cup
Date	2016-03-13		Rating	2632.25
Round	Color	Result	Opponent
S1	White	Win	Ishitani Shin-ichi	2392.28
S2	Black	Loss	Nakamura Shigeru	2941.16
S3	White	Win	Kusajima Masato	2264.90
S4	Black	Loss	Okabe Hiroshi	2720.50
16th Kanto Renju Emperor Tournament Final
Date	2016-02-14		Rating	2633.66
Round	Color	Result	Opponent
1	Black	Loss	Nakayama Tomoharu	2780.17
2	White	Loss	Nakayama Tomoharu	2780.17
11th All Japan Championship
Date	2016-01-11		Rating	2637.64
Round	Color	Result	Opponent
1	White	Win	Maruta Hiroki	2122.81
2	Black	Win	Nakamura Souta	2303.03
3	Black	Win	Okabe Hiroshi	2715.42
4	Black	Loss	Nakayama Tomoharu	2778.59
5	White	Loss	Sato Kiyotomi	2537.66
6	White	Draw	Tamada Yoichi	2572.90
16 Kanto Renju Emperor Tournament 2nd round
Date	2015-12-13		Rating	2641.85
Round	Color	Result	Opponent
1	White	Win	Sato Kiyotomi	2537.25
2	White	Win	Ono Takayuki	2325.69
3	Black	Loss	Okabe Hiroshi	2715.09
4	Black	Draw	Nakayama Tomoharu	2776.77
5	White	Win	Nakamura Shigeru	2924.23
16 Kanto Renju Emperor Tournament 1st round
Date	2015-11-15		Rating	2642.44
Round	Color	Result	Opponent
1	Black	Win	Ishitani Shin-ichi	2394.52
2	Black	Win	Sato Kiyotomi	2534.33
3	Black	Win	Okabe Hiroshi	2715.97
4	Black	Win	Ono Takayuki	2326.53
53 Meijinsen Tournament
Date	2015-09-22		Rating	2635.86
Round	Color	Result	Opponent
1	Black	Loss	Hasegawa Kazuto	2672.90
2	Black	Win	Oosumi Yuuki	2773.56
3	White	Win	Ishitani Shin-ichi	2392.71
4	Black	Draw	Nakayama Tomoharu	2769.83
5	White	Loss	Kawamura Norihiko	2623.10
6	White	Loss	Tamada Yoichi	2583.22
7	Black	Draw	Iio Yoshihiro	2532.03
8	White	Win	Matsuura Hiroshi	2399.42
9	Black	Draw	Okabe Hiroshi	2718.23
World Championship 2015, BT
Date	2015-08-12		Rating	2632.21
Round	Color	Result	Opponent
1	White	Win	Huang Xiuyi	2190.60
2	Black	Loss	Miyagawa Junzo	2247.34
3	Black	Win	Topkin Georg-Romet	2337.95
4	Black	Win	Wang Chih-Kung	2341.22
5	Black	Loss	Sirategyan Karen	2441.66
6	Black	Win	Ishitani Shin-ichi	2395.31
7	Black	Win	Lavrik-Karmazin Maksim	2292.43
8	White	Win	Mano Yoshihisa	2364.66
9	White	Draw	Nakayama Tomoharu	2766.00
World Championship 2015, QT
Date	2015-08-05		Rating	2632.04
Round	Color	Result	Opponent
1	Black	Win	Topkin Georg-Romet	2336.51
2	Black	Win	Nakayama Tomoharu	2764.60
3	Black	Loss	Kamiya Shunsuke	2705.90
4	White	Draw	Wang Qingqing	2627.83
5	Black	Win	Huang Yen-Hua	2475.92
6	Black	Loss	Epifanov Dmitry	2709.07
7	Black	Win	Lin Liu-Min	2568.84
Kanto Championship
Date	2015-07-20		Rating	2630.32
Round	Color	Result	Opponent
1	White	Win	Maruta Hiroki	2104.89
2	Black	Win	Nakamura Shigeru	2906.11
3	Black	Draw	Okabe Hiroshi	2727.14
4	White	Win	Iwano Fumio	2251.80
5	Black	Loss	Nakayama Tomoharu	2763.80
6	Black	Win	Zhao Jiadong	2137.04
53 Meijinsen Qualification East Japan area 2nd round
Date	2015-06-14		Rating	2623.04
Round	Color	Result	Opponent
1	White	Loss	Tamada Yoichi	2591.04
2	Black	Win	Sato Kiyotomi	2506.63
3	White	Win	Ono Takayuki	2324.95
5	Black	Draw	Kamiya Shunsuke	2692.70
6	White	Win	Nakamura Souta	2294.63
53 Meijinsen Qualification East Japan area 1st round
Date	2015-05-10		Rating	2615.28
Round	Color	Result	Opponent
1	Black	Win	Mitsumori Masao	2326.30
2	Black	Win	Iwano Fumio	2246.24
3	Black	Win	Nakamura Souta	2292.86
4	White	Loss	Kamiya Shunsuke	2686.87
10th All Japan Championship
Date	2015-03-29		Rating	2605.96
Round	Color	Result	Opponent
1	White	Win	Fujikawa Masaki	2093.59
2	White	Loss	Kamiya Shunsuke	2675.94
3	Black	Win	Kato Yasuhiro	2062.95
4	Black	Win	Mitsumori Masao	2324.79
5	Black	Loss	Ishitani Shin-ichi	2425.07
6	Black	Win	Tanizaki Ryusuke	2202.41
12 Kanto Renju Emperor Tournament 1st round
Date	2011-10-23		Rating	2438.29
Round	Color	Result	Opponent
1	Black	Loss	Oosumi Yuuki	2771.23
2	White	Win	Suzuki Rin	1991.11
3	White	Loss	Isobe Taizan	2421.72
4	White	Loss	Fukui Nobuhiro	2472.84
49 Meijinsen Qualification East-Japan area 1st round
Date	2011-06-12		Rating	2435.74
Round	Color	Result	Opponent
1	Black	Loss	Isobe Taizan	2408.79
2	Black	Win	Kudomi Takahiro	2413.34
3	Black	Loss	Nakayama Tomoharu	2554.08
4	Black	Win	Ono Takayuki	2396.62
ex	Black	Loss	Nakayama Tomoharu	2554.08
28th Kanto Shineisen Tournament
Date	2011-04-17		Rating	2436.53
Round	Color	Result	Opponent
1	White	Win	Kon Akira	2007.48
2	Black	Win	Kamiya Shunsuke	2412.25
3	White	Win	Ozawa Tetsushi	2092.50
4	White	Loss	Nakayama Tomoharu	2542.60
5	Black	Win	Tomobe Katsuhiro	2229.64
5	White	Loss	Kamiya Shunsuke	2412.25
14th Mikami Cup Tournament
Date	2011-01-30		Rating	2437.52
Round	Color	Result	Opponent
A1	Black	Win	Kon Akira	2000.08
A2	White	Loss	Iwano Fumio	2131.79
A3	Black	Win	Matsuoka Teruo	1989.37
A4	Black	Win	Kise Katsumi	2521.14
A5	Black	Win	Isobe Seiji	2023.95
8th Middle-dan Players Tournament
Date	2009-08-30		Rating	2444.48
Round	Color	Result	Opponent
1	White	Win	Yamamoto Yasuhiro	2147.92
2	White	Win	Gakumazawa Hideaki	2138.97
3	Black	Loss	Sato Kiyotomi	2433.99
4	White	Win	Miyagawa Junzo	2202.28
5	White	Draw	Maruyama Yasushi	2262.24
6	Black	Win	Ono Takayuki	2402.95
46th Meijinsen Qualification East-Japan area 2nd round
Date	2008-07-13		Rating	2441.59
Round	Color	Result	Opponent
	White	Loss	Kawamura Norihiko	2656.28
	White	Loss	Sato Kiyotomi	2434.06
	White	Win	Arita Nobuyoshi	2392.61
	White	Loss	Isobe Taizan	2414.44
	Black	Win	Nagao Noriaki	2260.97
46th Meijinsen Qualification East-Japan area 1st round
Date	2008-06-15		Rating	2443.21
Round	Color	Result	Opponent
1	Black	Win	Sato Kiyotomi	2428.63
2	White	Win	Tanno Yoshitaka	2121.81
3	Black	Win	Ono Takayuki	2399.08
4	Black	Win	Kudomi Takahiro	2338.94
25th Kanto Shineisen Tournament
Date	2008-04-13		Rating	2437.01
Round	Color	Result	Opponent
1	White	Win	Fujikawa Masaki	2103.81
2	Black	Win	Watanabe Tatsuya	2156.19
3	White	Win	Tomobe Katsuhiro	2064.34
4	Black	Win	Iwano Fumio	2189.09
5	Black	Draw	Ono Takayuki	2395.36
2nd All Japan Championship (WC Qualification)
Date	2007-03-25		Rating	2376.37
Round	Color	Result	Opponent
1	White	Win	Kuramoto Hideharu	1888.19
2	Black	Loss	Yamaguchi Yusui	2648.33
3	Black	Loss	Iio Yoshihiro	2521.54
4	White	Win	Maruta Hiroki	2024.58
5	White	Win	Tanno Yoshitaka	2129.32
6	Black	Win	Ono Takayuki	2342.64
10th Mikami Cup Tournament, A-class
Date	2007-01-28		Rating	2365.41
Round	Color	Result	Opponent
1	Black	Win	Matsuoka Teruo	1874.92
2	White	Loss	Iwano Fumio	2143.46
3	Black	Win	Maruta Hiroki	2021.36
4	White	Win	Tomobe Katsuhiro	2055.76
5	Black	Win	Kobayashi Koichi	2098.75
23rd Kanto Shinei Tournament
Date	2006-09-10		Rating	2342.41
Round	Color	Result	Opponent
1	White	Win	Maruta Hiroki	2003.25
1	Black	Win	Teshima Masakatsu	1952.40
2	Black	Loss	Tanizaki Ryusuke	2126.94
3	Black	Win	Matsuoka Teruo	1853.84
4	White	Win	Iwano Fumio	2110.65
5	White	Loss	Watanabe Tatsuya	2135.34
Meijin-sen Qual, East Japan area 1st round
Date	2006-06-18		Rating	2338.48
Round	Color	Result	Opponent
1	Black	Win	Maruta Koji	2112.66
2	White	Win	Mitsumori Masao	2253.09
3	Black	Win	Kudomi Takahiro	2284.22
4	Black	Loss	Kamemoto Daichi	2206.88
23rd Kanto Championship
Date	2006-05-21		Rating	2336.13
Round	Color	Result	Opponent
1	White	Loss	Kawamura Norihiko	2663.85
2	White	Win	Tanizaki Ryusuke	2113.77
3	Black	Win	Kudomi Takahiro	2282.64
4	White	Win	Isobe Taizan	2410.93
5	White	Loss	Nakamura Shigeru	2846.66
46th Suisei-sen tournament final round
Date	2006-04-16		Rating	2329.05
Round	Color	Result	Opponent
	White	Win	Itami Yoshiyuki	2157.86
	White	Win	Nagao Noriaki	2221.52
	White	Loss	Kato Yasuhiro	2051.64
	White	Win	Hara Masao	2077.84
	Black	Loss	Ono Takayuki	2304.71
1st All Japan Championship
Date	2006-03-26		Rating	2326.09
Round	Color	Result	Opponent
1	Black	Win	Tadokoro Hosai	1930.65
2	Black	Loss	Isobe Taizan	2425.17
3	Black	Loss	Tanizaki Ryusuke	2112.69
4	White	Win	Itami Yoshiyuki	2160.76
5	Black	Win	Sato Kiyotomi	2410.38
6	White	Win	Miyoshi Takeo	2274.78
46th Suisei-sen Tournament - 1st round
Date	2006-03-12		Rating	2323.68
Round	Color	Result	Opponent
1	Black	Win	Fujikawa Masaki	2029.66
2	White	Win	Tadokoro Hosai	1930.12
3	White	Loss	Nagao Noriaki	2223.51
4	White	Win	Tomobe Katsuhiro	2091.00
9th Mikami Cup - A Class
Date	2006-01-29		Rating	2317.30
Round	Color	Result	Opponent
1	Black	Win	Iwano Fumio	2074.14
2	White	Win	Teshima Masakatsu	1957.46
3	White	Loss	Ono Takayuki	2303.90
4	White	Win	Nakata Shinsuke	1976.18
5	Black	Win	Watanabe Tatsuya	2133.74
37th Kyoto Classified - group 1
Date	2005-11-13		Rating	2304.14
Round	Color	Result	Opponent
1	Black	Win	Ozawa Tetsushi	2015.50
2	White	Win	Itami Yoshiyuki	2179.77
3	White	Loss	Oosumi Yuuki	2404.62
4	White	Win	Hayashi Koji	2005.59
5	Black	Win	Ono Takayuki	2296.24
6	White	Loss	Shinoda Kiyoshi	2346.63
6th Kanto Renju Emperor Tournament - Semifinal
Date	2005-10-23		Rating	2299.79
Round	Color	Result	Opponent
	White	Loss	Yamaguchi Yusui	2595.56
	White	Loss	Okabe Hiroshi	2591.55
	White	Loss	Isobe Taizan	2457.66
	White	Loss	Kamemoto Daichi	2180.71
	White	Win	Sato Kiyotomi	2394.57
6th Kanto Renju Emperor Tournament - 1st round
Date	2005-10-22		Rating	2299.65
Round	Color	Result	Opponent
1	White	Win	Koyama Masayuki	1729.31
2	White	Loss	Sato Kiyotomi	2394.62
3	White	Win	Teshima Masakatsu	1957.88
4	Black	Win	Nakata Shinsuke	1967.98
22nd Kanto Shineisen Tournament
Date	2005-09-11		Rating	2294.37
Round	Color	Result	Opponent
1	Black	Win	Teshima Masakatsu	1957.89
2	White	Win	Tadokoro Hosai	1926.89
3	Black	Win	Tomobe Katsuhiro	2075.28
4	Black	Loss	Arita Nobuyoshi	2342.83
5	Black	Win	Kamemoto Daichi	2169.83
43rd Meijinsen Qualification: East Japan 1st round
Date	2005-06-12		Rating	2279.09
Round	Color	Result	Opponent
1	Black	Win	Maruta Koji	2152.11
2	Black	Loss	Kudomi Takahiro	2299.62
3	White	Loss	Arita Nobuyoshi	2324.90
4	White	Win	Ohno Syunzo	2074.69
22nd Kanto Championship
Date	2005-05-22		Rating	2276.37
Round	Color	Result	Opponent
1	White	Win	Mitsumori Masao	2266.69
2	White	Loss	Yamaguchi Yusui	2562.24
3	White	Win	Kudomi Takahiro	2300.12
4	Black	Loss	Maruta Koji	2156.77
5	White	Loss	Sato Kiyotomi	2394.27
45th Suisei-sen Tournament
Date	2005-03-20		Rating	2269.21
Round	Color	Result	Opponent
1	White	Win	Muramatsu Yasuhiro	1691.47
2	White	Win	Arita Nobuyoshi	2298.66
3	White	Win	Sano Hiroyuki	2135.97
4	Black	Win	Kobayashi Koichi	2093.52
8th Mikami Cup - A Class
Date	2005-01-23		Rating	2255.63
Round	Color	Result	Opponent
1	Black	Draw	Arita Nobuyoshi	2286.28
2	Black	Win	Nagumo Natsuhiko	2055.88
3	Black	Win	Kato Yasuhiro	2024.21
4	White	Loss	Nagao Noriaki	2244.07
5	Black	Win	Sato Kiyotomi	2370.50
5th Kanto Renju Emperor Tournament - 1st round
Date	2004-11-28		Rating	2238.08
Round	Color	Result	Opponent
1	White	Loss	Mitsumori Masao	2248.31
2	Black	Loss	Tomobe Katsuhiro	2030.95
3	Black	Win	Mao Richu	1771.85
4	Black	Loss	Iwano Fumio	2040.64
21st Kanto Shineisen Tournament
Date	2004-09-12		Rating	2230.60
Round	Color	Result	Opponent
1	White	Win	Shibata Satoru	1709.40
2	Black	Loss	Sato Kiyotomi	2365.94
3	Black	Win	Sato Takuma	2169.49
4	White	Draw	Tashiro Yuichi	2288.15
5	Black	Win	Hara Masao	2070.60
7th Mikami Cup - A class
Date	2004-01-25		Rating	2195.00
Round	Color	Result	Opponent
4	Black	Win	Kawabe Tatsuya	1879.63
5	Black	Win	Itami Yoshiyuki	2149.01
20th Kanto Shineisen Tournament
Date	2003-09-21		Rating	2167.55
Round	Color	Result	Opponent
1	White	Loss	Kato Yasuhiro	2047.09
2	White	Win	Maruta Hiroki	1934.91
3	White	Loss	Sato Takuma	2137.40
4	White	Win	Sasaki Miyu	1937.76
5	White	Loss	Itami Yoshiyuki	2152.04