| | |
| 1988 - 1988 |
| 40th Meijinsen Qualification: East Japan 1st round (02.06.2002)
|
| Okabe Hiroshi (2269) - Kato Yasuhiro | draw| +3 | |
| Maruta Koji (2258) - Kato Yasuhiro | won| - | |
| Isobe Taizan (2450) - Kato Yasuhiro | lost| -6 | |
| Kato Yasuhiro - Arita Nobuyoshi (0) | won| - | |
| 1988 - 1988 |
| 20th Kanto Shin-ei Tournament (21.9.2003)
|
| Kato Yasuhiro - Koyama Jun (0) | won| - | |
| Kato Yasuhiro - Arita Nobuyoshi (2112) | lost| - | |
| Kato Yasuhiro - Sato Kiyotomi (2193) | lost| - | |
| Kato Yasuhiro - Tadokoro Hosai (2103) | lost| -21 | |
| Kato Yasuhiro - Sato Koichi (1799) | won| - | |
| 2395 - 2380 |
| 4th Kanto Renju Emperor Tournament 1nd round (16.11.2003)
|
| Kato Yasuhiro - Oosaku Kazuyuki (0) | won| - | |
| Isobe Taizan (2345) - Kato Yasuhiro | lost| -9 | |
| Itami Yoshiyuki (1996) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Yamauchi Yasuhiro (0) | won| - | |
| 2380 - 2380 |
| 7 Mikami Cup. A Class (25.01.2004)
|
| Kato Yasuhiro - Sasaki Miyu (1904) | won| - | |
| Arita Nobuyoshi (2211) - Kato Yasuhiro | lost| -15 | |
| Sato Koichi (1802) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Uchiyama Yasuhiko (1796) | won| - | |
| Miyagawa So (1921) - Kato Yasuhiro | lost| -26 | |
| 2380 - 2380 |
| 21st Kanto Shin-ei Tournament (12.9.2004)
|
| Itami Yoshiyuki (2077) - Kato Yasuhiro | lost| -19 | |
| Maruta Hiroki (1945) - Kato Yasuhiro | won| - | |
| Tashiro Yuichi (2202) - Kato Yasuhiro | lost| - | |
| Sasaki Miyu (1872) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Iwano Fumio (1791) | won| - | |
| 2380 - 2380 |
| 5th Kanto Renju Emperor Tournament. 1st round (28.11.2004)
|
| Matsuoka Teruo (2095) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Itami Yoshiyuki (2043) | won| +13 | |
| Tomobe Katsuhiro (2053) - Kato Yasuhiro | lost| - | |
| Watanabe Tatsuya (2080) - Kato Yasuhiro | lost| -18 | |
| 2380 - 2380 |
| 8 Mikami Cup. A Class (23.01.2005)
|
| Kato Yasuhiro - Sasaki Miyu (1929) | won| - | |
| Kato Yasuhiro - Hara Masao (2156) | draw| +2 | |
| Koyama Jun (2127) - Kato Yasuhiro | lost| - | |
| Arita Nobuyoshi (2189) - Kato Yasuhiro | won| +19 | |
| Sato Takuma (2139) - Kato Yasuhiro | lost| -15 | |
| 2380 - 2380 |
| 45th Suisei-sen Tournament. 1st round (20.03.2005)
|
| Matsuoka Teruo (2090) - Kato Yasuhiro | lost| -17 | |
| Tanizaki Ryusuke (1760) - Kato Yasuhiro | won| - | |
| Sasaki Miyu (1894) - Kato Yasuhiro | lost| - | |
| Tomobe Katsuhiro (2067) - Kato Yasuhiro | lost| - | |
| 2380 - 2380 |
| Japan WC qalification 2005 (2-3.04.05)
|
| Ishitani Shin-ichi (2311) - Kato Yasuhiro | won| +25 | |
| Ono Takayuki (2283) - Kato Yasuhiro | draw| +8 | |
| Miyagawa Junzo (2256) - Kato Yasuhiro | lost| -9 | |
| Oosumi Yuuki (2114) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Maruta Koji (2313) | lost| -7 | |
| Kato Yasuhiro - Hara Masao (2122) | won| +17 | |
| 2380 - 2380 |
| 22st Kanto Shin-ei Tournament (11.9.2005)
|
| Tomobe Katsuhiro (2001) - Kato Yasuhiro | lost| -22 | |
| Kato Yasuhiro - Nakata Shinsuke (1901) | won| - | |
| Sasaki Miyu (2023) - Kato Yasuhiro | lost| -21 | |
| Tanizaki Ryusuke (1933) - Kato Yasuhiro | lost| -24 | |
| Kato Yasuhiro - Ishizaki Masatoshi (2039) | won| +12 | |
| 2380 - 2380 |
| 6th Kanto Renju Emperor Tournament. 1st round (23.10.2005)
|
| Teshima Masakatsu (1885) - Kato Yasuhiro | lost| - | |
| Yamauchi Takahiro (0) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Yoda Tsuyoshi (0) | won| - | |
| Tanizaki Ryusuke (1955) - Kato Yasuhiro | lost| -22 | |
| 2380 - 2380 |
| 9 Mikami Cup. A Class (29.01.2006)
|
| Watanabe Tatsuya (2093) - Kato Yasuhiro | lost| -14 | |
| Kato Yasuhiro - Matsuoka Teruo (1990) | won| +13 | |
| Kato Yasuhiro - Oonuma Nobuhiro (0) | won| - | |
| Kato Yasuhiro - Kamemoto Daichi (2127) | won| +19 | |
| Oosumi Yuuki (2345) - Kato Yasuhiro | lost| -5 | |
| 2060 - 2073 |
| 46th Suisei-sen Tournament. 1st round (12.03.2006)
|
| Kato Yasuhiro - Kamemoto Daichi (2109) | lost| -14 | |
| Kato Yasuhiro - Tanizaki Ryusuke (1986) | won| +12 | |
| Kato Yasuhiro - Iwano Fumio (1936) | won| +10 | |
| Kato Yasuhiro - Watanabe Tatsuya (2115) | won| +18 | |
| 2073 - 2099 |
| 1-st All Japan Championship (25-26.03.2006)
|
| Iio Yoshihiro (2352) - Kato Yasuhiro | won| +26 | |
| Oosumi Yuuki (2378) - Kato Yasuhiro | lost| -5 | |
| Mitsumori Masao (2210) - Kato Yasuhiro | lost| -11 | |
| Kudomi Takahiro (2187) - Kato Yasuhiro | draw| +4 | |
| Maruta Koji (2192) - Kato Yasuhiro | lost| -12 | |
| Kato Yasuhiro - Nagao Noriaki (2177) | won| +20 | |
| 2099 - 2121 |
| 46th Suisei-sen Tournament, Final (16.04.2006)
|
| Ono Takayuki (2225) - Kato Yasuhiro | lost| -11 | |
| Koyama Jun (2241) - Kato Yasuhiro | won| +21 | |
| Hara Masao (2004) - Kato Yasuhiro | lost| -21 | |
| Kato Yasuhiro - Nagao Noriaki (2135) | draw| +1 | |
| Kato Yasuhiro - Itami Yoshiyuki (2157) | won| +18 | |
| 2121 - 2129 |
| 23rd Kanto Championship (28.05.2006)
|
| Mitsumori Masao (2231) - Kato Yasuhiro | lost| -11 | |
| Iwano Fumio (1926) - Kato Yasuhiro | draw| -8 | |
| Tomobe Katsuhiro (2070) - Kato Yasuhiro | lost| -19 | |
| Nagao Noriaki (2090) - Kato Yasuhiro | lost| -18 | |
| Kato Yasuhiro - Fujikawa Masaki (1932) | won| +8 | |
| 2129 - 2081 |
| 44th Meijinsen Qualification: East Japan 1st round (18.06.2006)
|
| Mitsumori Masao (2277) - Kato Yasuhiro | lost| -8 | |
| Nagao Noriaki (2132) - Kato Yasuhiro | lost| -14 | |
| Kato Yasuhiro - Hara Masao (2085) | won| +16 | |
| Kubo Izumi (2098) - Kato Yasuhiro | draw| +1 | |
| 2081 - 2076 |
| 23rd Kanto Shin-ei Tournament (10.9.2006)
|
| Kamemoto Daichi (2185) - Kato Yasuhiro | won| +21 | |
| Iwano Fumio (1995) - Kato Yasuhiro | lost| -20 | |
| Watanabe Yoko (0) - Kato Yasuhiro | draw| - | |
| Tanizaki Ryusuke (1999) - Kato Yasuhiro | lost| -20 | |
| Maruta Hiroki (1887) - Kato Yasuhiro | lost| -24 | |
| 2076 - 2033 |
| 7th Kanto Renju Emperor Tournament. 1st round (15.10.2006)
|
| Kato Yasuhiro - Yamamoto Junko (1844) | won| - | |
| Kato Yasuhiro - Abiko Setsuko (0) | won| - | |
| Isobe Taizan (2314) - Kato Yasuhiro | draw| +11 | |
| Mitsumori Masao (2213) - Kato Yasuhiro | lost| -8 | |
| Kudomi Takahiro (2193) - Kato Yasuhiro | lost| -9 | |
| 2033 - 2027 |
| 10 Mikami Cup. A Class (28.01.2007)
|
| Watanabe Tatsuya (2108) - Kato Yasuhiro | won| +20 | |
| Maruta Hiroki (1933) - Kato Yasuhiro | won| +12 | |
| Iwano Fumio (1982) - Kato Yasuhiro | lost| -18 | |
| Kobayashi Koichi (2100) - Kato Yasuhiro | lost| -13 | |
| Matsuoka Teruo (1906) - Kato Yasuhiro | lost| -21 | |
| 2027 - 2007 |
| 2-nd All Japan Championship (24-25.03.2007)
|
| Miyoshi Takeo (2232) - Kato Yasuhiro | lost| -7 | |
| Oosumi Yuuki (2367) - Kato Yasuhiro | lost| -4 | |
| Maruta Hiroki (1956) - Kato Yasuhiro | lost| -18 | |
| Tanizaki Ryusuke (2020) - Kato Yasuhiro | won| +17 | |
| Ishitani Shin-ichi (2321) - Kato Yasuhiro | lost| -4 | |
| Kuramoto Hideharu (1932) - Kato Yasuhiro | lost| -19 | |
| 2007 - 1972 |
| 24th Kanto Shin-ei Tournament (15.4.2007)
|
| Matsuoka Teruo (1936) - Kato Yasuhiro | lost| -18 | |
| Teshima Masakatsu (1922) - Kato Yasuhiro | lost| -18 | |
| Kato Yasuhiro - Tanji Hiroki (1895) | won| - | |
| Tamada Yoichi (0) - Kato Yasuhiro | lost| - | |
| Ozawa Tetsushi (1986) - Kato Yasuhiro | lost| -15 | |
| 1972 - 1921 |
| 47th Suisei-sen Tournament. 1st round (23.09.2007)
|
| Fujikawa Masaki (2023) - Kato Yasuhiro | lost| -11 | |
| Watanabe Yoko (1991) - Kato Yasuhiro | lost| -13 | |
| Kato Yasuhiro - Maruta Hiroki (1957) | won| +18 | |
| Kato Yasuhiro - Matsuoka Teruo (1936) | won| +17 | |
| 1921 - 1932 |
| 6th 6th-7th dan Tournament (7-8.10.2007)
|
| Ono Takayuki (2228) - Kato Yasuhiro | lost| -5 | |
| Kato Yasuhiro - Kubo Izumi (2013) | won| +20 | |
| Gakumazawa Hideaki (2184) - Kato Yasuhiro | lost| -6 | |
| Kato Yasuhiro - Tadokoro Hosai (1889) | won| +14 | |
| Miyagawa Junzo (2155) - Kato Yasuhiro | lost| -7 | |
| Sato Kiyotomi (2282) - Kato Yasuhiro | lost| -4 | |
| 1932 - 1944 |
| 8th Kanto Renju Emperor Tournament. 1st round (28.10.2007)
|
| Tange Makiko (0) - Kato Yasuhiro | lost| - | |
| Kato Yasuhiro - Tanji Hiroki (1774) | won| +9 | |
| Nakayama Tomoharu (1822) - Kato Yasuhiro | lost| - | |
| Maruta Hiroki (1930) - Kato Yasuhiro | lost| -17 | |
| Watanabe Tatsuya (2048) - Kato Yasuhiro | lost| -11 | |
| 1944 - 1925 |
| 11 Mikami Cup. A Class (20.01.2008)
|
| Matsuoka Teruo (1888) - Kato Yasuhiro | won| +14 | |
| Iwano Fumio (2070) - Kato Yasuhiro | lost| -10 | |
| Kuramoto Hideharu (1917) - Kato Yasuhiro | lost| -16 | |
| Tamada Yoichi (2091) - Kato Yasuhiro | lost| -9 | |
| Ozawa Tetsushi (2004) - Kato Yasuhiro | lost| -12 | |
| 1925 - 1892 |
| 3-rd All Japan Championship (22-23.03.2008)
|
| Ono Takayuki (2275) - Kato Yasuhiro | lost| -3 | |
| Kato Yasuhiro - Maruta Koji (2116) | won| +25 | |
| Kato Yasuhiro - Tanizaki Ryusuke (2079) | draw| +8 | |
| Sato Kiyotomi (2297) - Kato Yasuhiro | lost| -3 | |
| Fujikawa Masaki (2062) - Kato Yasuhiro | lost| -9 | |
| Kato Yasuhiro - Tadokoro Hosai (1938) | won| +18 | |
| 1892 - 1928 |
| 25th Kanto Shin-ei Tournament (13.4.2008)
|
| Kato Yasuhiro - Matsuoka Teruo (1887) | lost| -18 | |
| Kato Yasuhiro - Takeuchi Yuta (0) | won| - | |
| Fujikawa Masaki (2071) - Kato Yasuhiro | lost| -10 | |
| Kato Yasuhiro - Harada Motochika (1831) | won| +12 | |
| Watanabe Tatsuya (2027) - Kato Yasuhiro | lost| -12 | |
| 1928 - 1900 |
| 25th Kanto Championship (18.05.2008)
|
| Nakamura Shigeru (2787) - Kato Yasuhiro | lost| +0 | |
| Kato Yasuhiro - Iwano Fumio (2137) | won| +26 | |
| Kudomi Takahiro (2250) - Kato Yasuhiro | won| +28 | |
| Mitsumori Masao (2175) - Kato Yasuhiro | lost| -5 | |
| Isobe Taizan (2408) - Kato Yasuhiro | lost| -2 | |
| 1900 - 1947 |
1988 - 1947 (-41)