| | |
| All games with provisionals |
| 40th Meijinsen Qualification: East Japan 1st round (02.06.2002)
|
| Ohno Syunzo (2041) - Arita Nobuyoshi | won| - | |
| Mitsumori Masao (2336) - Arita Nobuyoshi | won| - | |
| Okabe Hiroshi (2269) - Arita Nobuyoshi | lost| - | |
| Kato Yasuhiro (2209) - Arita Nobuyoshi | lost| - | |
| Rating = 2302 + (400 (1 - 1)) / 2 G=0 P=0 | 0 |
| 34-th Kyoto Classified. 1 group (10.11.2002)
|
| Ono Takayuki (2232) - Arita Nobuyoshi | draw| - | |
| Yamamoto Keisuke (2046) - Arita Nobuyoshi | lost| - | |
| Arita Nobuyoshi - Ikeshima Wakio (1803) | won| - | |
| Arita Nobuyoshi - Hasegawa Shunzo (1839) | won| - | |
| Yoshikawa Hiromasa (1955) - Arita Nobuyoshi | lost| - | |
| Arita Nobuyoshi - Takehara Kenji (2043) | won| - | |
| All games with provisionals |
| Japan WC qalification 2003 (22.03.03)
|
| Isobe Taizan (2438) - Arita Nobuyoshi | lost| - | |
| Iio Yoshihiro (2378) - Arita Nobuyoshi | lost| - | |
| Nagao Noriaki (2088) - Arita Nobuyoshi | lost| - | |
| Arita Nobuyoshi - Kuramoto Hideharu (2132) | won| - | |
| Arita Nobuyoshi - Hara Masao (2246) | won| - | |
| Rating = (2006*3 + 4816 + 400*(0 - 2)) / (3 + 2) G=3 P=1.5 | 2006 |
| 41th Meijinsen Qualification: East Japan 1st round (08.06.2003)
|
| Suzuki Naoya (2366) - Arita Nobuyoshi | lost| - | |
| Arita Nobuyoshi - Ohno Syunzo (2026) | won| - | |
| Arita Nobuyoshi - Tadokoro Hosai (2058) | won| - | |
| Arita Nobuyoshi - Nagao Noriaki (2088) | draw| - | |
| Rating = (2006*3 + 4454 + 400*(0 - 1)) / (3 + 2) G=3 P=1.5 | 2006 |
| 20th Kanto Shin-ei Tournament (21.9.2003)
|
| Maruta Hiroki (0) - Arita Nobuyoshi | won| - | |
| Kato Yasuhiro (2209) - Arita Nobuyoshi | won| - | |
| Nagao Noriaki (2152) - Arita Nobuyoshi | lost| - | |
| Sato Takuma (2021) - Arita Nobuyoshi | won| - | |
| Tashiro Yuichi (2122) - Arita Nobuyoshi | lost| - | |
| Rating = (2006*3 + 4361 + 400*(1 - 1)) / (3 + 2) G=3 P=1.5 | 2006 |
| 7 Mikami Cup. A Class (25.01.2004)
|
| Arita Nobuyoshi - Watanabe Tatsuya (0) | won| - | |
| Arita Nobuyoshi - Kato Yasuhiro (2179) | won| +15 | |
| Arita Nobuyoshi - Tadokoro Hosai (2103) | won| +11 | |
| Arita Nobuyoshi - Sato Kiyotomi (2318) | won| +21 | |
| Arita Nobuyoshi - Hara Masao (2214) | draw| +0 | |
| Rating = (2006*3 + 6496 + 400*(2 - 0)) / (3 + 3) G=3 P=1.5 | 2006 |
| 44th Suisei-sen Tournament, Final (11.04.2004)
|
| Sato Kiyotomi (2318) - Arita Nobuyoshi | lost| -11 | |
| Sato Takuma (2131) - Arita Nobuyoshi | lost| -20 | |
| Sano Hiroyuki (2233) - Arita Nobuyoshi | lost| - | |
| Kitamura Mitsuhiro (0) - Arita Nobuyoshi | draw| - | |
| Arita Nobuyoshi - Hara Masao (2214) | won| +16 | |
| All games with provisionals |
| 21st Kanto Shin-ei Tournament (12.9.2004)
|
| Arita Nobuyoshi - Ishizaki Masatoshi (0) | won| - | |
| Arita Nobuyoshi - Tashiro Yuichi (2202) | won| - | |
| Arita Nobuyoshi - Watanabe Tatsuya (1637) | lost| - | |
| Arita Nobuyoshi - Matsuoka Teruo (0) | won| - | |
| Arita Nobuyoshi - Kamemoto Daichi (0) | won| - | |
| All games with provisionals |
| 5th Kanto Renju Emperor Tournament. 1st round (28.11.2004)
|
| Arita Nobuyoshi - Iwano Fumio (1757) | won| - | |
| Arita Nobuyoshi - Tanizaki Ryusuke (1809) | won| - | |
| Okabe Hiroshi (2435) - Arita Nobuyoshi | lost| -6 | |
| Arita Nobuyoshi - Tomobe Katsuhiro (2053) | won| - | |
| All games with provisionals |
| 5th 6th-7th dan Tournament (4-5.12.2004)
|
| Arita Nobuyoshi - Kobayashi Koichi (0) | won| - | |
| Kubo Izumi (2192) - Arita Nobuyoshi | lost| -16 | |
| Arita Nobuyoshi - Gakumazawa Hideaki (0) | won| - | |
| Kudomi Takahiro (2294) - Arita Nobuyoshi | won| +21 | |
| Arita Nobuyoshi - Miyagawa Junzo (2262) | draw| +3 | |
| Sato Kiyotomi (2344) - Arita Nobuyoshi | lost| -9 | |
| All games with provisionals |
| 8 Mikami Cup. A Class (23.01.2005)
|
| Koyama Jun (2127) - Arita Nobuyoshi | draw| - | |
| Arita Nobuyoshi - Matsuoka Teruo (2090) | won| +12 | |
| Ono Takayuki (2236) - Arita Nobuyoshi | lost| -14 | |
| Arita Nobuyoshi - Kato Yasuhiro (2114) | lost| -19 | |
| Arita Nobuyoshi - Hara Masao (2156) | won| +14 | |
| All games with provisionals |
| 45th Suisei-sen Tournament. 1st round (20.03.2005)
|
| Arita Nobuyoshi - Sasaki Miyu (1894) | won| - | |
| Arita Nobuyoshi - Koyama Jun (2194) | lost| -15 | |
| Arita Nobuyoshi - Matsuoka Teruo (2090) | won| +12 | |
| Arita Nobuyoshi - Maruta Hiroki (1946) | won| - | |
| All games with provisionals |
| Japan WC qalification 2005 (2-3.04.05)
|
| Okabe Hiroshi (2507) - Arita Nobuyoshi | lost| -4 | |
| Oosumi Yuuki (2114) - Arita Nobuyoshi | lost| - | |
| Arita Nobuyoshi - Tanizaki Ryusuke (1812) | won| - | |
| Yamaguchi Yusui (2513) - Arita Nobuyoshi | draw| +12 | |
| Mitsumori Masao (2165) - Arita Nobuyoshi | lost| -17 | |
| Miyagawa So (1961) - Arita Nobuyoshi | draw| -9 | |
| All games with provisionals |
| 45th Suisei-sen Tournament, Final (17.04.2005)
|
| Sato Kiyotomi (2328) - Arita Nobuyoshi | lost| -9 | |
| Tashiro Yuichi (2255) - Arita Nobuyoshi | won| +20 | |
| Arita Nobuyoshi - Nagao Noriaki (2139) | won| +15 | |
| Arita Nobuyoshi - Ono Takayuki (2290) | lost| -10 | |
| Arita Nobuyoshi - Hara Masao (2076) | draw| -4 | |
| All games with provisionals |
| 22nd Kanto Championship (22.05.2005)
|
| Arita Nobuyoshi - Tomobe Katsuhiro (2001) | won| +9 | |
| Arita Nobuyoshi - Tanizaki Ryusuke (1933) | won| +6 | |
| Isobe Taizan (2410) - Arita Nobuyoshi | draw| +10 | |
| Arita Nobuyoshi - Yamaguchi Yusui (2465) | won| +27 | |
| Kawamura Norihiko (2763) - Arita Nobuyoshi | lost| -1 | |
| All games with provisionals |
| 43rd Meijinsen Qualification: East Japan 1st round (12.06.2005)
|
| Mitsumori Masao (2167) - Arita Nobuyoshi | lost| -19 | |
| Arita Nobuyoshi - Sasaki Miyu (2016) | won| +7 | |
| Arita Nobuyoshi - Koyama Jun (2204) | won| +15 | |
| Arita Nobuyoshi - Nagao Noriaki (2165) | won| +13 | |
| All games with provisionals |
| 22st Kanto Shin-ei Tournament (11.9.2005)
|
| Arita Nobuyoshi - Matsuoka Teruo (2032) | won| +7 | |
| Arita Nobuyoshi - Sasaki Miyu (2023) | won| +7 | |
| Arita Nobuyoshi - Watanabe Tatsuya (2097) | won| +10 | |
| Arita Nobuyoshi - Koyama Jun (2206) | won| +14 | |
| Arita Nobuyoshi - Iwano Fumio (1957) | won| +5 | |
| All games with provisionals |
| 6th Kanto Renju Emperor Tournament. 1st round (23.10.2005)
|
| Arita Nobuyoshi - Nakata Shinsuke (1971) | won| +5 | |
| Yamaguchi Yusui (2482) - Arita Nobuyoshi | lost| -8 | |
| Arita Nobuyoshi - Tanizaki Ryusuke (1955) | draw| -12 | |
| Arita Nobuyoshi - Maruta Koji (2246) | won| +14 | |
| All games with provisionals |
| 23rd Kanto Championship (28.05.2006)
|
| Arita Nobuyoshi - Tanizaki Ryusuke (2029) | won| +6 | |
| Arita Nobuyoshi - Nagao Noriaki (2090) | won| +8 | |
| Arita Nobuyoshi - Isobe Taizan (2419) | won| +22 | |
| Okabe Hiroshi (2462) - Arita Nobuyoshi | lost| -8 | |
| Kawamura Norihiko (2681) - Arita Nobuyoshi | draw| +13 | |
| 2282 - 2323 |
| 44th Meijinsen Qualification: East Japan Final (9.07.2006)
|
| Sato Kiyotomi (2286) - Arita Nobuyoshi | lost| -18 | |
| Nagao Noriaki (2099) - Arita Nobuyoshi | lost| -25 | |
| Kamemoto Daichi (2100) - Arita Nobuyoshi | won| +7 | |
| 2323 - 2287 |
| 44th Meijinsen Qualification: East Japan 1st round (18.06.2006)
|
| Arita Nobuyoshi - Iwano Fumio (1975) | draw| -11 | |
| Arita Nobuyoshi - Maruta Koji (2192) | won| +12 | |
| Arita Nobuyoshi - Isobe Taizan (2343) | won| +19 | |
| Arita Nobuyoshi - Kudomi Takahiro (2187) | won| +12 | |
| 2287 - 2319 |
| 7th Kanto Renju Emperor Tournament. 1st round (15.10.2006)
|
| Arita Nobuyoshi - Fujikawa Masaki (1924) | won| +3 | |
| Arita Nobuyoshi - Tanizaki Ryusuke (2042) | lost| -27 | |
| Arita Nobuyoshi - Harada Motochika (1858) | won| +2 | |
| Arita Nobuyoshi - Maruta Hiroki (1901) | won| +3 | |
| Arita Nobuyoshi - Hara Masao (2092) | won| +7 | |
| 2319 - 2307 |
| 24th Kanto Championship (06.05.2007)
|
| Arita Nobuyoshi - Tamada Yoichi (2006) | won| - | |
| Kudomi Takahiro (2164) - Arita Nobuyoshi | lost| -22 | |
| Arita Nobuyoshi - Fujikawa Masaki (2062) | won| +6 | |
| Sato Kiyotomi (2386) - Arita Nobuyoshi | won| +20 | |
| Ishitani Shin-ichi (2297) - Arita Nobuyoshi | lost| -16 | |
| 2307 - 2295 |
| 45th Meijinsen Qualification: East Japan 1st round (17.06.2007)
|
| Arita Nobuyoshi - Iwano Fumio (2061) | draw| -9 | |
| Arita Nobuyoshi - Tamura Kazumasa (2250) | won| +14 | |
| Arita Nobuyoshi - Mitsumori Masao (2196) | won| +12 | |
| Arita Nobuyoshi - Isobe Taizan (2315) | draw| +1 | |
| 2295 - 2313 |
| 45th Meijinsen Qualification: East Japan Final (8.07.2007)
|
| Sato Kiyotomi (2379) - Arita Nobuyoshi | lost| -13 | |
| Isobe Taizan (2324) - Arita Nobuyoshi | lost| -15 | |
| Kudomi Takahiro (2255) - Arita Nobuyoshi | lost| -19 | |
| 2313 - 2266 |
| 25th Kanto Championship (18.05.2008)
|
| Arita Nobuyoshi - Fujikawa Masaki (2111) | won| +9 | |
| Arita Nobuyoshi - Isobe Taizan (2408) | won| +22 | |
| Arita Nobuyoshi - Mitsumori Masao (2175) | won| +12 | |
| Nakamura Shigeru (2787) - Arita Nobuyoshi | lost| -2 | |
| Okabe Hiroshi (2506) - Arita Nobuyoshi | lost| -6 | |
| 2266 - 2301 |
| 46th Meijinsen Qualification: East Japan 1st round (15.06.2008)
|
| Arita Nobuyoshi - Iwano Fumio (2111) | won| +8 | |
| Arita Nobuyoshi - Ono Takayuki (2264) | lost| -18 | |
| Arita Nobuyoshi - Mitsumori Masao (2198) | draw| -5 | |
| Arita Nobuyoshi - Tamada Yoichi (2123) | won| +8 | |
| 2301 - 2294 |
| 46th Meijinsen Qualification: East Japan Final (13.07.2008)
|
| Kawamura Norihiko (2576) - Arita Nobuyoshi | draw| +11 | |
| Sato Kiyotomi (2234) - Arita Nobuyoshi | lost| -19 | |
| Arita Nobuyoshi - Isobe Taizan (2391) | won| +20 | |
| Arita Nobuyoshi - Koyama Jun (2347) | lost| -14 | |
| Arita Nobuyoshi - Nagao Noriaki (2199) | won| +12 | |
| 2294 - 2304 |
2304