12th All Japan Championship
2017-03-25 -> 2017-03-26
Rating: 2435.4 -> 2420.14
Opponent Rating Round Result R. Change
Kusajima Masato 2123 1
win
+4.56
Nakamura Shigeru 2671 2
loss
-6.54
Ishitani Shin-ichi 2164 3
win
+5.57
Nakayama Tomoharu 2524 4
win
+20.01
Kamiya Shunsuke 2492 5
loss
-13.39
Tachi Masaya 2198 6
loss
-25.48
20 New Year (Mikami) Cup
2017-01-22
Rating: 2438.75 -> 2435.4
Opponent Rating Round Result R. Change
Sato Kiyotomi 2379 S2
win
+13.30
Nakamura Shigeru 2622 S3
loss
-8.26
Ishitani Shin-ichi 2211 S4
win
+6.82
Okabe Hiroshi 2455 S5
loss
-15.21
54 Meijinsen Tournament
2016-09-17 -> 2016-09-19
Rating: 2442.91 -> 2438.75
Opponent Rating Round Result R. Change
Matsuura Hiroshi 2311 1
win
+10.23
Kamiya Shunsuke 2372 2
loss
-19.21
Hasegawa Kazuto 2510 3
draw
+3.07
Iio Yoshihiro 2374 4
draw
-3.09
Tanaka Toshiki 2402 5
win
+14.16
Nakayama Tomoharu 2549 6
draw
+4.76
Maruyama Yasushi 2156 7
draw
-10.83
Kuga Akio 2316 8
win
+10.42
Okabe Hiroshi 2493 9
loss
-13.67
54 Meijinsen Qualification East Japan area 2nd round
2016-06-11 -> 2016-06-12
Rating: 2414.35 -> 2442.91
Opponent Rating Round Result R. Change
Kusajima Masato 2145 1
win
+5.62
Kamiya Shunsuke 2426 2
win
+16.56
Tamada Yoichi 2386 3
win
+14.72
Mitsumori Masao 2144 4
draw
-10.41
Okabe Hiroshi 2459 5
draw
+2.08
16th Kanto Renju Emperor Tournament Final
2016-02-14
Rating: 2438.51 -> 2414.35
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2525 1
loss
-12.08
Nakayama Tomoharu 2525 2
loss
-12.08
16 Kanto Renju Emperor Tournament 2nd round
2015-12-13
Rating: 2400.72 -> 2438.51
Opponent Rating Round Result R. Change
Sato Kiyotomi 2333 1
win
+12.94
Ono Takayuki 2166 2
win
+6.59
Okabe Hiroshi 2470 3
loss
-12.84
Nakayama Tomoharu 2514 4
draw
+5.04
Nakamura Shigeru 2657 5
win
+26.06
16 Kanto Renju Emperor Tournament 1st round
2015-11-15
Rating: 2346.54 -> 2400.72
Opponent Rating Round Result R. Change
Ishitani Shin-ichi 2156 1
win
+8.03
Sato Kiyotomi 2315 2
win
+14.57
Okabe Hiroshi 2512 3
win
+23.12
Ono Takayuki 2168 4
win
+8.47
53 Meijinsen Tournament
2015-09-20 -> 2015-09-22
Rating: 2312.54 -> 2346.54
Opponent Rating Round Result R. Change
Hasegawa Kazuto 2477 1
loss
-8.94
Oosumi Yuuki 2651 2
win
+28.02
Ishitani Shin-ichi 2143 3
win
+8.79
Nakayama Tomoharu 2485 4
draw
+7.35
Kawamura Norihiko 2423 5
loss
-11.04
Tamada Yoichi 2356 6
loss
-13.99
Iio Yoshihiro 2321 7
draw
+0.42
Matsuura Hiroshi 2294 8
win
+15.16
Okabe Hiroshi 2509 9
draw
+8.22
World Championship BT
2015-08-07 -> 2015-08-12
Rating: 2334.48 -> 2312.54
Opponent Rating Round Result R. Change
Huang Xiuyi 1742 1
win
+1.02
Miyagawa Junzo 2081 2
loss
-25.95
Topkin Georg-Romet 1834 3
win
+1.71
Wang Chih-Kung 2001 4
win
+4.11
Sirategyan Karen 1997 5
loss
-27.99
Ishitani Shin-ichi 2218 6
win
+10.87
Lavrik-Karmazin  Maksim 1578 7
win
+0.41
Mano Yoshihisa 2144 8
win
+8.05
Nakayama Tomoharu 2467 9
draw
+5.85
World Championship QT
2015-08-03 -> 2015-08-05
Rating: 2315.54 -> 2334.48
Opponent Rating Round Result R. Change
Topkin Georg-Romet 1796 1
win
+1.54
Nakayama Tomoharu 2530 2
win
+24.81
Kamiya Shunsuke 2420 3
loss
-11.31
Wang Qingqing 2312 4
draw
-0.15
Huang Yen-Hua 2118 5
win
+7.79
Epifanov Dmitry 2308 6
loss
-16.30
Lin Liu-Min 2239 7
win
+12.56
Kanto Championship
2015-07-19 -> 2015-07-20
Rating: 2270.78 -> 2315.54
Opponent Rating Round Result R. Change
Maruta Hiroki 1928 1
win
+3.92
Nakamura Shigeru 2699 2
win
+29.50
Okabe Hiroshi 2568 3
draw
+11.13
Iwano Fumio 2055 4
win
+7.18
Nakayama Tomoharu 2493 5
loss
-6.97
Zhao Jiadong   6
win
-
53 Meijinsen Qualification East Japan area 1st round
2015-05-10
Rating: 2256.29 -> 2270.78
Opponent Rating Round Result R. Change
Mitsumori Masao 2136 1
win
+10.71
Iwano Fumio 2062 2
win
+7.88
Nakamura Souta 2011 3
win
+6.29
Kamiya Shunsuke 2383 4
loss
-10.39
10th All Japan Championship
2015-03-28 -> 2015-03-29
Rating: 2251.48 -> 2256.29
Opponent Rating Round Result R. Change
Fujikawa Masaki 1883 1
win
+3.43
Kamiya Shunsuke 2374 2
loss
-10.58
Kato Yasuhiro 1988 3
win
+5.77
Mitsumori Masao 2196 4
win
+13.51
Ishitani Shin-ichi 2277 5
loss
-14.80
Tanizaki Ryusuke 2045 6
win
+7.48
12 Kanto Renju Emperor Tournament 1st round
2011-10-23
Rating: 2291.06 -> 2251.48
Opponent Rating Round Result R. Change
Oosumi Yuuki 2542 1
loss
-6.08
Suzuki Rin 1878 2
win
+2.73
Isobe Taizan 2253 3
loss
-17.71
Fukui Nobuhiro 2235 4
loss
-18.52
49 Meijinsen Qualification East-Japan area 1st round
2011-06-12
Rating: 2319.93 -> 2291.06
Opponent Rating Round Result R. Change
Isobe Taizan 2258 1
loss
-18.82
Kudomi Takahiro 2275 2
win
+13.96
Nakayama Tomoharu 2272 3
loss
-18.18
Ono Takayuki 2239 4
win
+12.36
Nakayama Tomoharu 2272 ex
loss
-18.18
14th Mikami Cup Tournament
2011-01-30
Rating: 2343.31 -> 2319.93
Opponent Rating Round Result R. Change
Kon Akira 1847 A1
win
+1.74
Iwano Fumio 2067 A2
loss
-26.57
Matsuoka Teruo 1813 A3
win
+1.44
Kise Katsumi   A4
win
-
Isobe Seiji   A5
win
-
8th Middle-dan Players Tournament
2009-08-29 -> 2009-08-30
Rating: 2330 -> 2343.31
Opponent Rating Round Result R. Change
Yamamoto Yasuhiro 2073 1
win
+5.94
Gakumazawa Hideaki 2153 2
win
+8.49
Sato Kiyotomi 2368 3
loss
-14.23
Miyagawa Junzo 2134 4
win
+7.82
Maruyama Yasushi 2149 5
draw
-7.66
Ono Takayuki 2262 6
win
+12.94
RIF update 2009-05-15
2009-05-15
Rating: 2316.96 -> 2330
46th Meijinsen Qualification East-Japan area 2nd round
2008-07-13
Rating: 2335.37 -> 2316.96
Opponent Rating Round Result R. Change
Kawamura Norihiko 2566
loss
-6.69
Sato Kiyotomi 2237
loss
-20.37
Arita Nobuyoshi 2282
win
+13.57
Isobe Taizan 2367
loss
-14.53
Nagao Noriaki 2188
win
+9.61
46th Meijinsen Qualification East-Japan area 1st round
2008-06-15
Rating: 2287.43 -> 2335.37
Opponent Rating Round Result R. Change
Sato Kiyotomi 2221 1
win
+13.01
Tanno Yoshitaka 2069 2
win
+7.11
Ono Takayuki 2247 3
win
+14.15
Kudomi Takahiro 2236 4
win
+13.67
25th Kanto Shineisen Tournament
2008-04-13
Rating: 2259 -> 2287.43
Opponent Rating Round Result R. Change
Fujikawa Masaki 2073 1
win
+8.18
Watanabe Tatsuya 1991 2
win
+5.64
Tomobe Katsuhiro 1937 3
win
+4.34
Iwano Fumio 2093 4
win
+8.92
Ono Takayuki 2288 5
draw
+1.34
2nd All Japan Championship (WC Qualification)
2007-03-24 -> 2007-03-25
Rating: 2239.25 -> 2259
Opponent Rating Round Result R. Change
Kuramoto Hideharu 1951 1
win
+5.12
Yamaguchi Yusui 2575 2
loss
-4.04
Iio Yoshihiro 2428 3
loss
-8.07
Maruta Hiroki 1937 4
win
+4.79
Tanno Yoshitaka 2049 5
win
+8.02
Ono Takayuki 2193 6
win
+13.92
10th Mikami Cup Tournament, A-class
2007-01-28
Rating: 2239.85 -> 2239.25
Opponent Rating Round Result R. Change
Matsuoka Teruo 1890 1
win
+3.79
Iwano Fumio 2003 2
loss
-25.48
Maruta Hiroki 1914 3
win
+4.26
Tomobe Katsuhiro 2069 4
win
+8.73
Kobayashi Koichi 2052 5
win
+8.10
23rd Kanto Shinei Tournament
2006-09-10
Rating: 2278.23 -> 2239.85
Opponent Rating Round Result R. Change
Teshima Masakatsu 1885 1
win
+3.03
Maruta Hiroki 1869 1
win
+2.78
Tanizaki Ryusuke 1998 2
loss
-26.67
Matsuoka Teruo 1897 3
win
+3.22
Iwano Fumio 1998 4
win
+5.34
Watanabe Tatsuya 2021 5
loss
-26.07
Meijin-sen Qual, East Japan area 1st round
2006-06-18
Rating: 2261.16 -> 2278.23
Opponent Rating Round Result R. Change
Maruta Koji 2159 1
win
+11.47
Mitsumori Masao 2266 2
win
+16.26
Kudomi Takahiro 2181 3
win
+12.38
Kamemoto Daichi 2097 4
loss
-23.03
23rd Kanto Championship
2006-05-21
Rating: 2217.09 -> 2261.16
Opponent Rating Round Result R. Change
Kawamura Norihiko 2673 1
loss
-2.16
Tanizaki Ryusuke 2010 2
win
+7.45
Kudomi Takahiro 2210 3
win
+15.71
Isobe Taizan 2405 4
win
+23.92
Nakamura Shigeru 2841 5
loss
-0.85
46th Suisei-sen tournament final round
2006-04-16
Rating: 2228.19 -> 2217.09
Opponent Rating Round Result R. Change
Itami Yoshiyuki 2118
win
+11.11
Nagao Noriaki 2113
win
+10.91
Kato Yasuhiro 2076
loss
-22.56
Hara Masao 2001
win
+6.81
Ono Takayuki 2198
loss
-17.38
1st All Japan Championship
2006-03-25 -> 2006-03-26
Rating: 2204.16 -> 2228.19
Opponent Rating Round Result R. Change
Tadokoro Hosai 1982 1
win
+6.98
Isobe Taizan 2394 2
loss
-8.02
Tanizaki Ryusuke 1974 3
loss
-25.27
Itami Yoshiyuki 2102 4
win
+11.44
Sato Kiyotomi 2299 5
win
+20.27
Miyoshi Takeo 2261 6
win
+18.63
46th Suisei-sen Tournament - 1st round
2006-03-12
Rating: 2208.32 -> 2204.16
Opponent Rating Round Result R. Change
Fujikawa Masaki   1
win
-
Tadokoro Hosai 2004 2
win
+7.54
Nagao Noriaki 2101 3
loss
-20.77
Tomobe Katsuhiro 2047 4
win
+9.07
9th Mikami Cup - A Class
2006-01-29
Rating: 2206.68 -> 2208.32
Opponent Rating Round Result R. Change
Iwano Fumio 1952 1
win
+6.01
Teshima Masakatsu   2
win
-
Ono Takayuki 2167 3
loss
-17.79
Nakata Shinsuke 1931 4
win
+5.44
Watanabe Tatsuya 2015 5
win
+7.99
37th Kyoto Classified - group 1
2005-11-13
Rating: 2199.58 -> 2206.68
Opponent Rating Round Result R. Change
Ozawa Tetsushi   1
win
-
Itami Yoshiyuki 2133 2
win
+12.98
Oosumi Yuuki 2305 3
loss
-11.26
Hayashi Koji   4
win
-
Ono Takayuki 2171 5
win
+14.71
Shinoda Kiyoshi 2353 6
loss
-9.33
6th Kanto Renju Emperor Tournament - Semifinal
2005-10-23
Rating: 2219.29 -> 2199.58
Opponent Rating Round Result R. Change
Yamaguchi Yusui 2478
loss
-5.87
Okabe Hiroshi 2472
loss
-6.05
Isobe Taizan 2437
loss
-7.10
Kamemoto Daichi 2072
loss
-22.37
Sato Kiyotomi 2348
win
+21.68
6th Kanto Renju Emperor Tournament - 1st round
2005-10-22
Rating: 2231.23 -> 2219.29
Opponent Rating Round Result R. Change
Koyama Masayuki   1
win
-
Sato Kiyotomi 2321 2
loss
-11.94
Teshima Masakatsu   3
win
-
Nakata Shinsuke   4
win
-
22nd Kanto Shineisen Tournament
2005-09-11
Rating: 2227.89 -> 2231.23
Opponent Rating Round Result R. Change
Teshima Masakatsu   1
win
-
Tadokoro Hosai 2036 2
win
+7.98
Tomobe Katsuhiro 1966 3
win
+5.80
Arita Nobuyoshi 2209 4
loss
-16.85
Kamemoto Daichi 1987 5
win
+6.40
43rd Meijinsen Qualification: East Japan 1st round
2005-06-12
Rating: 2232.74 -> 2227.89
Opponent Rating Round Result R. Change
Maruta Koji 2263 1
win
+17.39
Kudomi Takahiro 2269 2
loss
-14.33
Arita Nobuyoshi 2189 3
loss
-17.98
Ohno Syunzo 2097 4
win
+10.07
22nd Kanto Championship
2005-05-22
Rating: 2231.61 -> 2232.74
Opponent Rating Round Result R. Change
Mitsumori Masao 2153 1
win
+12.47
Yamaguchi Yusui 2470 2
loss
-6.47
Kudomi Takahiro 2302 3
win
+19.24
Maruta Koji 2263 4
loss
-14.54
Sato Kiyotomi 2379 5
loss
-9.58
45th Suisei-sen Tournament
2005-03-20
Rating: 2200.81 -> 2231.61
Opponent Rating Round Result R. Change
Muramatsu Yasuhiro   1
win
-
Arita Nobuyoshi 2160 2
win
+14.13
Sano Hiroyuki 2215 3
win
+16.67
Kobayashi Koichi   4
win
-
8th Mikami Cup - A Class
2005-01-23
Rating: 2200 = 2160 + (400 * (5.5 - 4.5)) / 10
Opponent Rating Round Result R. Change
Arita Nobuyoshi 2182 1
draw
-
Nagumo Natsuhiko 2122 2
win
-
Kato Yasuhiro 2028 3
win
-
Nagao Noriaki 2106 4
loss
-
Sato Kiyotomi 2315 5
win
-
5th Kanto Renju Emperor Tournament - 1st round
2004-11-28
Provisional: 2090 = 2170 + (400 * (2 - 3)) / 5
Opponent Rating Round Result R. Change
Mitsumori Masao 2212 1
loss
-
Tomobe Katsuhiro   2
loss
-
Mao Richu   3
win
-
Iwano Fumio   4
loss
-
21st Kanto Shineisen Tournament
2004-09-12
Provisional: 2160 = 2160 + (400 * (2 - 2)) / 4
Opponent Rating Round Result R. Change
Shibata Saturo   1
win
-
Sato Kiyotomi 2307 2
loss
-
Sato Takuma 2103 3
win
-
Tashiro Yuichi   4
draw
-
Hara Masao 2177 5
win
-
7th Mikami Cup - A class
2004-01-25
Provisional: 1651 = 2051 + (400 * (0 - 1)) / 1
Opponent Rating Round Result R. Change
Kawabe Tatsuya   4
win
-
Itami Yoshiyuki   5
win
-
20th Kanto Shineisen Tournament
2003-09-21
Provisional: 1651 = 2051 + (400 * (0 - 1)) / 1
Opponent Rating Round Result R. Change
Kato Yasuhiro 2051 1
loss
-
Maruta Hiroki   2
win
-
Sato Takuma   3
loss
-
Sasaki Miyu   4
win
-
Itami Yoshiyuki   5
loss
-
Name: Jun
Surname: Koyama
Rating: 2420
Top Rating: 2442

Country: Japan
City: Tokyo

Wins: 126
Losses: 67
Draws: 17
Gy1: 24
Gy2: 69
Gy5: 75
Hover the mouse over the opponent's name to see the personal score of Jun Koyama with this player.
Time: 0.0221028327942 sec.