Maruta Koji (丸田光治)

Place: Tokyo, Japan

Rating: 2177.04, Std: 99.33, Rank: 466

First game: 1996-03-01, Last game: 2024-02-12

Top rating: 2229.30 (2003-11-16)

Games: 245, Wins: 96, Draws: 8, Losses: 141

Gy1: 10, Gy2: 22, Gy5: 62

18th All Japan Championship
Date	2024-02-12		Rating	2177.04
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2358.23
2	Black	Win	Jang Eun Min	2323.71
3	White	Win	Ishitani Shin-ichi	2391.99
4	White	Loss	Park Woong-bae	2356.41
5	White	Win	Tanaka Shotaro	2298.78
6	White	Loss	Lee Ho June	2396.45
24 Kanto Renju Emperor Tournament Kanto area 1st round
Date	2023-11-19		Rating	2163.83
Round	Color	Result	Opponent
3	White	Loss	Tanaka Shotaro	2298.55
4	Black	Loss	Yoshikawa Tomoki	2086.45
40 Kanto Championship
Date	2023-07-09		Rating	2156.82
Round	Color	Result	Opponent
1	Black	Loss	Tanaka Shotaro	2303.56
4	White	Win	Suzuki Yoshitaka	1946.97
17th All Japan Championship
Date	2023-03-19		Rating	2151.80
Round	Color	Result	Opponent
5	White	Loss	Matsuda Shoma	2320.09
6	White	Loss	Takazawa Nagayoshi	2278.84
23 Kanto Renju Emperor Tournament 2nd round
Date	2023-01-29		Rating	2152.86
Round	Color	Result	Opponent
1	Black	Loss	Kamiya Shunsuke	2845.92
2	White	Loss	Fujita Maiko	2394.76
3	White	Loss	Yokoyama Shota	2449.45
4	White	Loss	Inoue Fumiya	2517.22
5	White	Loss	Okabe Hiroshi	2668.90
23 Renju Emperor Tournament Kanto area 1st round
Date	2022-11-06		Rating	2159.63
Round	Color	Result	Opponent
2	White	Win	Kasahara Reiko	1668.81
3	White	Win	Tomobe Katsuhiro	2069.57
4	Black	Win	Tanaka Shotaro	2306.51
39 Kanto Championship
Date	2022-07-31		Rating	2155.23
Round	Color	Result	Opponent
2	White	Win	Li Haoyang	1951.18
3	White	Loss	Ishitani Shin-ichi	2342.57
Special Tournament
Date	2022-04-10		Rating	2150.43
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2392.50
2	White	Loss	Inoue Fumiya	2498.73
3	White	Win	Maruta Hiroki	2198.11
38 Kanto Championship
Date	2021-08-08		Rating	2133.10
Round	Color	Result	Opponent
1	White	Loss	Inoue Fumiya	2492.50
2	White	Win	Kobayashi Nanako	1999.04
3	White	Win	Fujita Maiko	2337.81
16th All Japan Championship
Date	2021-03-28		Rating	2109.38
Round	Color	Result	Opponent
1	White	Loss	Makino Mitsunori	2555.55
2	White	Loss	Ishitani Shin-ichi	2335.68
3	White	Loss	Yoshimoto Yuta	2223.72
4	White	Loss	Kawaai Hitoshi	1999.11
5	White	Loss	Suenaga Daiki	2262.60
6	Black	Win	Maruta Hiroki	2217.17
24th New Year(Mikami)Cup
Date	2021-01-29		Rating	2104.97
Round	Color	Result	Opponent
S1	Black	Win	Maruta Hiroki	2215.94
S2	White	Loss	Makino Mitsunori	2549.19
S3	White	Loss	Okabe Hiroshi	2722.87
S4	Black	Loss	Ono Takayuki	2379.48
S5	White	Loss	Ishitani Shin-ichi	2351.33
21 Renju Emperor Tournament Kanto area 1st round
Date	2020-11-15		Rating	2097.70
Round	Color	Result	Opponent
1	White	Loss	Kawaai Hitoshi	1999.48
2	White	Loss	Suenaga Daiki	2266.05
3	White	Loss	Shimura Hiroki	1981.71
4	White	Win	Kasahara Reiko	1680.34
37 Kanto Championship
Date	2020-08-10		Rating	2104.37
Round	Color	Result	Opponent
3	White	Win	Okada Akihiro	1909.68
5	Black	Loss	Kato Yasuhiro	2066.38
6	Black	Win	Shimura Hiroki	1949.28
58 Meijinsen Qualification Kanto area 1st round
Date	2020-06-21		Rating	2107.90
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2358.82
2	White	Win	Ito Midori	1752.51
20 Renju Emperor Tournament Kanto area 1st round
Date	2019-11-10		Rating	2125.64
Round	Color	Result	Opponent
2	White	Win	Shibata Satoru	1810.62
3	White	Loss	Ishitani Shin-ichi	2363.99
4	White	Win	Tomobe Katsuhiro	2116.55
36 Kanto Championship
Date	2019-07-28		Rating	2129.00
Round	Color	Result	Opponent
5	White	Win	Shibata Satoru	1806.41
6	White	Loss	Miyamoto Syunju	2275.32
57 Meijinsen Qualification East Japan area 2nd round
Date	2019-06-23		Rating	2130.77
Round	Color	Result	Opponent
1	White	Loss	Kusajima Masato	2248.25
2	White	Loss	Koyama Jun	2599.07
3	Black	Win	Maruta Hiroki	2175.81
4	White	Loss	Ono Takayuki	2388.98
5	White	Draw	Inoue Fumiya	2416.24
57 Meijinsen Qualification Kanto area 1st round
Date	2019-05-12		Rating	2131.40
Round	Color	Result	Opponent
1	White	Win	Inoue Fumiya	2416.88
2	White	Win	Maruta Hiroki	2178.47
3	White	Loss	Ono Takayuki	2391.69
4	Black	Loss	Mitsumori Masao	2308.15
13 Middle-dan Players Tournament
Date	2018-08-12		Rating	2106.51
Round	Color	Result	Opponent
1	White	Loss	Kusajima Masato	2296.06
2	White	Loss	Miyamoto Syunju	2254.96
4	White	Loss	Kusajima Masato	2296.06
5	White	Loss	Miyamoto Syunju	2254.96
35 Kanto Championship
Date	2018-07-16		Rating	2107.35
Round	Color	Result	Opponent
1	Black	Loss	Nakayama Tomoharu	2830.40
56 Meijinsen Qualification Kanto area 1st round
Date	2018-05-13		Rating	2109.44
Round	Color	Result	Opponent
1	White	Loss	Sato Kiyotomi	2435.30
18 Kanto Renju Emperor Tournament 1st round
Date	2017-11-01		Rating	2118.60
Round	Color	Result	Opponent
1	White	Loss	Okabe Hiroshi	2715.03
2	Black	Win	Koyama Akihiro	1957.71
3	White	Loss	Ishitani Shin-ichi	2387.18
4	White	Loss	Maruta Hiroki	2135.43
34 Kanto Championship
Date	2017-07-16		Rating	2128.51
Round	Color	Result	Opponent
1	White	Win	Matsumoto Hiro	1723.04
2	Black	Loss	Ishitani Shin-ichi	2386.57
3	White	Loss	Ishima Ryoma	2157.04
12th All Japan Championship
Date	2017-03-26		Rating	2145.71
Round	Color	Result	Opponent
1	White	Draw	Iio Yoshihiro	2540.98
2	White	Loss	Tachi Masaya	2525.49
3	Black	Draw	Nishida Toshio	2084.19
4	Black	Loss	Ono Takayuki	2360.93
5	White	Win	Sakamoto Suzan	2265.44
6	White	Loss	Fujita Yudai	2481.44
17 Kanto Renju Emperor Tournament 2nd round
Date	2016-12-10		Rating	2155.70
Round	Color	Result	Opponent
1	Black	Loss	Nakayama Tomoharu	2778.74
2	White	Loss	Okabe Hiroshi	2709.97
3	Black	Loss	Sato Kiyotomi	2496.11
4	White	Loss	Ishitani Shin-ichi	2393.02
5	White	Loss	Nakamura Shigeru	2954.37
17 Kanto Renju Emperor Tournament 1st round
Date	2016-11-23		Rating	2158.06
Round	Color	Result	Opponent
1	White	Loss	Okabe Hiroshi	2708.67
2	Black	Win	Demachi Koichiro	1926.42
3	White	Loss	Sato Kiyotomi	2497.25
4	White	Win	Maruta Hiroki	2111.97
ex1	Black	Loss	Iwano Fumio	2263.26
33 Kanto Championship
Date	2016-07-31		Rating	2172.46
Round	Color	Result	Opponent
1	White	Win	Cho Enkun	1648.96
2	Black	Loss	Okabe Hiroshi	2717.49
3	White	Win	Kato Yasuhiro	2036.52
54 Meijinsen Qualification Kanto area 1st round
Date	2016-05-22		Rating	2178.74
Round	Color	Result	Opponent
2	Black	Loss	Sato Kiyotomi	2515.78
3	White	Win	Iwano Fumio	2236.38
4	Black	Loss	Mitsumori Masao	2349.40
11th All Japan Championship
Date	2016-01-11		Rating	2187.89
Round	Color	Result	Opponent
1	Black	Loss	Kamiya Shunsuke	2718.29
2	Black	Draw	Chigira Makoto	2023.90
3	White	Loss	Fujita Yudai	2441.80
5	White	Win	Kato Yasuhiro	2032.17
6	White	Win	Suzuki Rin	1919.07
Kanto Championship
Date	2015-07-20		Rating	2199.78
Round	Color	Result	Opponent
1	White	Loss	Nakayama Tomoharu	2759.42
4	White	Win	Hashimoto Takuya	2007.21
5	Black	Win	Kato Yasuhiro	2048.84
6	White	Win	Fujikawa Masaki	2101.96
10th All Japan Championship
Date	2015-03-29		Rating	2196.57
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2671.61
2	White	Win	Fujikawa Masaki	2088.56
31th Kanto Championship
Date	2014-05-11		Rating	2177.08
Round	Color	Result	Opponent
2	White	Loss	Tamura Kazumasa	2519.05
3	White	Loss	Tomobe Katsuhiro	2108.11
4	White	Win	Maruta Hiroki	2099.06
11th Middle-dan players Tournament
Date	2013-08-17		Rating	2170.73
Round	Color	Result	Opponent
1	White	Loss	Kashihara Akihiko	2337.01
2	Black	Loss	Kato Yasuhiro	2129.53
3	White	Win	Maruta Hiroki	2132.96
4	White	Win	Kubo Izumi	2089.34
5	Black	Win	Miyagawa Junzo	2215.28
6	White	Loss	Nakayama Tomoharu	2647.48
51 Meijinsen Qualification East-Japan area 1st round
Date	2013-06-16		Rating	2165.83
Round	Color	Result	Opponent
1	White	Loss	Isobe Taizan	2388.93
29th Kanto Championship
Date	2013-05-12		Rating	2163.91
Round	Color	Result	Opponent
3	Black	Loss	Suzuki Rin	2045.32
4	White	Win	Nakamura Souta	2073.31
5	White	Win	Tada Ayako	2285.57
13 Kanto Renju Emperor Tournament 1st round
Date	2012-10-21		Rating	2144.26
Round	Color	Result	Opponent
1	White	Win	Higuchi Fumiya	1602.49
2	Black	Win	Mitsumori Masao	2343.76
3	White	Loss	Tada Ayako	2301.69
4	White	Loss	Ishitani Shin-ichi	2356.64
50 Meijinsen Qualification East-Japan area 1st round
Date	2012-06-03		Rating	2126.25
Round	Color	Result	Opponent
1	White	Loss	Mitsumori Masao	2361.17
2	White	Loss	Iwano Fumio	2130.05
3	White	Loss	Ono Takayuki	2427.23
4	Black	Win	Maruta Hiroki	2089.70
4th Tohoku Championship
Date	2012-04-08		Rating	2121.56
Round	Color	Result	Opponent
1	Black	Loss	Nakamura Shigeru	2877.98
2	White	Win	Maruta Hiroki	2082.12
3	White	Loss	Kobayashi Koichi	2220.58
4	White	Loss	Kusajima Masato	2178.11
5	White	Win	Hirono Masakazu	1994.69
12 Kanto Renju Emperor Tournament 1st round
Date	2011-10-23		Rating	2107.93
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2438.90
49 Meijinsen Qualification East-Japan area 1st round
Date	2011-06-12		Rating	2099.05
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2416.13
28th Kanto Championship
Date	2011-05-22		Rating	2097.97
Round	Color	Result	Opponent
1	White	Loss	Nakayama Tomoharu	2543.40
2	White	Loss	Arai Kazumi	2368.59
3	White	Loss	Suzuki Rin	1988.26
4	White	Win	Maruta Hiroki	2107.52
5	White	Loss	Fujikawa Masaki	2098.01
11 Kanto Renju Emperor Tournament 1st round
Date	2010-10-31		Rating	2107.50
Round	Color	Result	Opponent
1	Black	Win	Kato Yasuhiro	2065.84
2	White	Loss	Okabe Hiroshi	2693.47
Meijinsen Qualification East-Japan area 1st round
Date	2010-06-27		Rating	2107.72
Round	Color	Result	Opponent
1	White	Loss	Fukui Nobuhiro	2317.84
2	White	Win	Arai Kazumi	2314.53
3	White	Loss	Kudomi Takahiro	2394.79
4	Black	Loss	Tada Ayako	2191.19
27th Kanto Championship
Date	2010-05-23		Rating	2107.80
Round	Color	Result	Opponent
1	Black	Loss	Nakamura Shigeru	2855.24
2	White	Loss	Tomobe Katsuhiro	2205.71
5th All Japan Championship
Date	2010-03-21		Rating	2110.58
Round	Color	Result	Opponent
4	Black	Win	Kusajima Masato	2165.69
10 Kanto Renju Emperor Tournament 1st round
Date	2009-10-04		Rating	2107.20
Round	Color	Result	Opponent
1	White	Loss	Tanji Hiroki	2050.82
2	White	Loss	Tomobe Katsuhiro	2151.00
3	White	Win	Tanizaki Ryusuke	2101.88
4	Black	Win	Fujikawa Masaki	2047.66
26th Kanto Championship
Date	2009-05-17		Rating	2106.09
Round	Color	Result	Opponent
4	Black	Win	Matsuoka Teruo	1906.71
5	Black	Win	Kato Yasuhiro	2022.19
4th All Japan Championship
Date	2009-03-21		Rating	2101.70
Round	Color	Result	Opponent
4	White	Win	Suzuki Rin	1950.16
5	Black	Loss	Tanizaki Ryusuke	2123.62
6	Black	Loss	Nagao Noriaki	2269.79
9th Kanto Renju Emperor Tournament, 1st round
Date	2008-10-26		Rating	2097.73
Round	Color	Result	Opponent
1	Black	Draw	Tamada Yoichi	2266.26
2	Black	Win	Tada Ayako	2003.95
3	Black	Loss	Ono Takayuki	2407.39
4	White	Loss	Nakayama Tomoharu	2283.20
25th Kanto Championship
Date	2008-05-18		Rating	2089.90
Round	Color	Result	Opponent
3	White	Win	Tanizaki Ryusuke	2118.51
4	Black	Win	Kobayashi Koichi	2096.18
5	Black	Loss	Kudomi Takahiro	2334.73
3rd All Japan Championship
Date	2008-03-23		Rating	2081.86
Round	Color	Result	Opponent
1	White	Loss	Yamaguchi Yusui	2610.63
2	Black	Loss	Kato Yasuhiro	1983.64
3	White	Loss	Tadokoro Hosai	1924.45
4	Black	Loss	Fujikawa Masaki	2104.30
5	White	Loss	Nakayama Tomoharu	2228.84
6	Black	Draw	Tanizaki Ryusuke	2119.28
8 Kanto Renju Emperor Tournament 1st round
Date	2007-10-21		Rating	2095.86
Round	Color	Result	Opponent
1	White	Win	Takeuchi Shunsuke	1935.43
2	White	Win	Yamashita Daisuke	1901.81
3	White	Loss	Ishitani Shin-ichi	2396.84
4	White	Loss	Nakayama Tomoharu	2200.65
5	Black	Win	Matsuoka Teruo	1870.43
45th Meijinsen Qualification East-Japan area 1st round
Date	2007-06-17		Rating	2103.93
Round	Color	Result	Opponent
1	Black	Win	Tanizaki Ryusuke	2135.53
2	Black	Loss	Isobe Taizan	2431.18
3	White	Loss	Iwano Fumio	2162.52
4	White	Win	Hara Masao	2051.68
7th Kanto Renju Emperor Tournament - 1st round
Date	2006-10-15		Rating	2108.12
Round	Color	Result	Opponent
1	Black	Win	Matsuoka Teruo	1854.54
2	White	Loss	Maruta Hiroki	2007.65
3	Black	Win	Fujikawa Masaki	2052.94
4	Black	Loss	Hara Masao	2090.30
5	Black	Win	Tanizaki Ryusuke	2125.98
Meijin-sen Qual, East Japan area 1st round
Date	2006-06-18		Rating	2110.57
Round	Color	Result	Opponent
1	White	Loss	Koyama Jun	2336.45
2	Black	Loss	Arita Nobuyoshi	2366.53
3	White	Loss	Ono Takayuki	2299.05
4	Black	Loss	Hara Masao	2081.76
23rd Kanto Championship
Date	2006-05-21		Rating	2114.86
Round	Color	Result	Opponent
1	White	Win	Iwano Fumio	2093.21
2	Black	Loss	Mitsumori Masao	2256.52
3	Black	Win	Tadokoro Hosai	1932.66
4	Black	Loss	Nakamura Shigeru	2843.93
5	White	Loss	Hara Masao	2081.25
1st All Japan Championship
Date	2006-03-26		Rating	2124.33
Round	Color	Result	Opponent
4	White	Win	Tadokoro Hosai	1928.69
5	Black	Win	Kato Yasuhiro	2052.69
6	White	Win	Tomobe Katsuhiro	2088.56
6th Kanto Renju Emperor Tournament - 1st round
Date	2005-10-22		Rating	2131.72
Round	Color	Result	Opponent
1	Black	Win	Iwano Fumio	2069.31
2	White	Loss	Itami Yoshiyuki	2180.23
3	Black	Loss	Tomobe Katsuhiro	2078.59
4	White	Loss	Arita Nobuyoshi	2344.51
43rd Meijinsen Qualification: East Japan 1st round
Date	2005-06-12		Rating	2150.07
Round	Color	Result	Opponent
1	White	Loss	Koyama Jun	2277.16
2	White	Win	Tanno Yoshitaka	2091.85
3	White	Loss	Nagao Noriaki	2227.76
4	Black	Loss	Itami Yoshiyuki	2187.49
22nd Kanto Championship
Date	2005-05-22		Rating	2154.72
Round	Color	Result	Opponent
1	White	Win	Ishizaki Masatoshi	1913.95
2	Black	Loss	Kawamura Norihiko	2689.90
3	Black	Win	Sasaki Miyu	1963.37
4	White	Win	Koyama Jun	2274.44
5	White	Loss	Ishitani Shin-ichi	2395.50
Japan WC Qualification tournament
Date	2005-04-03		Rating	2160.85
Round	Color	Result	Opponent
4	White	Win	Tanizaki Ryusuke	2072.33
5	Black	Win	Kato Yasuhiro	2023.12
6	White	Loss	Kubo Izumi	2168.61
5th Kanto Renju Emperor Tournament - 1st round
Date	2004-11-28		Rating	2173.81
Round	Color	Result	Opponent
1	Black	Loss	Sato Koichi	2010.31
2	White	Win	Sasaki Miyu	1953.80
3	Black	Win	Maruta Hiroki	1956.50
4	White	Win	Matsuoka Teruo	1885.80
42nd Meijinsen Qualification: East Japan 1st round
Date	2004-06-13		Rating	2193.29
Round	Color	Result	Opponent
4	Black	Loss	Sano Hiroyuki	2163.29
4th Kanto Renju Emperor Tournament - 2nd round
Date	2003-11-30		Rating	2227.83
Round	Color	Result	Opponent
	White	Win	Nagao Noriaki	2280.15
	White	Win	Mitsumori Masao	2265.31
	Black	Loss	Isobe Taizan	2422.07
	Black	Loss	Yamaguchi Yusui	2592.55
	Black	Loss	Okabe Hiroshi	2557.01
4th Kanto Renju Emperor Tournament - 1st round
Date	2003-11-16		Rating	2229.30
Round	Color	Result	Opponent
1	Black	Win	Yamauchi Yasuhiro	1804.40
2	White	Win	Nagao Noriaki	2283.73
3	White	Draw	Yamaguchi Yusui	2590.81
4	White	Win	Kubo Izumi	2217.66
41th Meijinsen Qualification: East Japan 1st round
Date	2003-06-08		Rating	2218.82
Round	Color	Result	Opponent
1	White	Loss	Sano Hiroyuki	2208.13
2	White	Win	Mitsumori Masao	2291.42
3	White	Loss	Sato Kiyotomi	2297.40
4	Black	Draw	Kubo Izumi	2223.65
40th Meijinsen Qualification: East Japan 1st round
Date	2002-06-02		Rating	2206.81
Round	Color	Result	Opponent
1	White	Loss	Isobe Taizan	2447.09
2	Black	Loss	Kato Yasuhiro	2097.16
3	White	Win	Ohno Syunzo	1993.93
4	Black	Win	Sato Takuma	2068.53
38th Meijinsen Qualification: East Japan 1st round
Date	2000-06-04		Rating	2208.74
Round	Color	Result	Opponent
1	Black	Win	Sunagawa Shouki	2210.55
2	White	Win	Mitsumori Masao	2291.80
3	White	Loss	Kudomi Takahiro	2352.96
4	White	Loss	Isobe Taizan	2453.02
Kanto Championship
Date	2000-05-14		Rating	2207.35
Round	Color	Result	Opponent
1	White	Loss	Nakamura Shigeru	2758.56
2	White	Loss	Hara Masao	2119.69
3	Black	Win	Tadokoro Hosai	1971.92
4	Black	Win	Kato Yasuhiro	2053.65
36 Suiseisen Tournament 1st round
Date	1996-03-01		Rating	2134.20
Round	Color	Result	Opponent
4	White	Win	Tanuma Akira	1844.40