| | |
| All games with provisionals |
| Japan WC qalification 2001 (23-24.03.01)
|
| Isobe Taizan - Miyagawa Junzo (2154) | won| +4 | |
| Isobe Taizan - Miyoshi Takeo (2347) | lost| -22 | |
| Isobe Taizan - Koiso Shigemasa (2227) | draw| -10 | |
| Isobe Taizan - Okabe Hiroshi (2225) | won| +6 | |
| All games with provisionals |
| 40th Meijinsen Qualification: East Japan 1st round (02.06.2002)
|
| Isobe Taizan - Maruta Koji (2258) | won| - | |
| Isobe Taizan - Suzuki Naoya (2388) | lost| -19 | |
| Isobe Taizan - Kato Yasuhiro (2209) | won| +6 | |
| Isobe Taizan - Kubo Izumi (2177) | won| +5 | |
| All games with provisionals |
| 40th Meijinsen Qualification: East Japan 2nd (14.07.2002)
|
| Isobe Taizan - Okabe Hiroshi (2280) | draw| -7 | |
| Isobe Taizan - Nara Hideki (2519) | won| +20 | |
| Isobe Taizan - Sunagawa Shouki (2230) | won| +7 | |
| All games with provisionals |
| Meijinsen Tournament 40 (14-16.09.2002)
|
| Hasegawa Kazuto (2594) - Isobe Taizan | draw| +6 | |
| Yamaguchi Yusui (2530) - Isobe Taizan | lost| -13 | |
| Kudomi Takahiro (2283) - Isobe Taizan | draw| -8 | |
| Iio Yoshihiro (2344) - Isobe Taizan | draw| -5 | |
| Isobe Taizan - Takagawa Teiji (2327) | lost| -22 | |
| Isobe Taizan - Okabe Hiroshi (2324) | won| +10 | |
| Isobe Taizan - Ishitani Shin-ichi (2446) | won| +15 | |
| Isobe Taizan - Nishimura Toshio (2442) | lost| -17 | |
| Isobe Taizan - Matsuura Hiroshi (2329) | won| +10 | |
| All games with provisionals |
| Japan WC qalification 2003 (22.03.03)
|
| Isobe Taizan - Arita Nobuyoshi (2302) | won| - | |
| Isobe Taizan - Iwata Akihisa (2144) | won| +5 | |
| Okabe Hiroshi (2335) - Isobe Taizan | lost| -21 | |
| Isobe Taizan - Mitsumori Masao (2363) | won| +13 | |
| Isobe Taizan - Miyagawa Junzo (2170) | won| +6 | |
| 2360 - 2360 |
| 41th Meijinsen Qualification: East Japan 2nd (13.07.2003)
|
| Isobe Taizan - Okabe Hiroshi (2409) | draw| -1 | |
| Isobe Taizan - Suzuki Naoya (2367) | won| +13 | |
| Isobe Taizan - Sato Kiyotomi (2274) | won| - | |
| 2374 - 2374 |
| Meijinsen Tournament 41 (13-15.09.2003)
|
| Hasegawa Kazuto (2545) - Isobe Taizan | lost| -12 | |
| Iio Yoshihiro (2407) - Isobe Taizan | lost| -18 | |
| Matsuura Hiroshi (2319) - Isobe Taizan | draw| -6 | |
| Okabe Hiroshi (2474) - Isobe Taizan | lost| -15 | |
| Kuga Akio (2402) - Isobe Taizan | draw| -2 | |
| Kudomi Takahiro (2330) - Isobe Taizan | lost| -21 | |
| Ishitani Shin-ichi (2310) - Isobe Taizan | lost| -22 | |
| Isobe Taizan - Miyagawa Junzo (2221) | lost| -25 | |
| Isobe Taizan - Takashima Junya (2383) | won| +13 | |
| 2374 - 2374 |
| 4th Kanto Renju Emperor Tournament 1nd round (16.11.2003)
|
| Isobe Taizan - Maruta Hiroki (0) | won| - | |
| Isobe Taizan - Kato Yasuhiro (2188) | won| +9 | |
| Isobe Taizan - Hara Masao (2188) | won| +9 | |
| Okabe Hiroshi (2468) - Isobe Taizan | lost| -11 | |
| 2323 - 2323 |
| 4th Kanto Renju Emperor Tournament 2nd round (30.11.2003)
|
| Okabe Hiroshi (2483) - Isobe Taizan | lost| -10 | |
| Yamaguchi Yusui (2483) - Isobe Taizan | lost| -10 | |
| Isobe Taizan - Maruta Koji (2308) | won| +14 | |
| Isobe Taizan - Mitsumori Masao (2307) | won| +14 | |
| Isobe Taizan - Nagao Noriaki (2143) | won| +7 | |
| 2323 - 2323 |
| 2nd Shanghai Meijin (18-20.03.2004)
|
| Yamaguchi Yusui (2539) - Isobe Taizan | lost| -9 | |
| Chen Lin (0) - Isobe Taizan | lost| - | |
| Li Hongbin (2096) - Isobe Taizan | draw| - | |
| Isobe Taizan - Ge Lingfeng (2008) | won| - | |
| Isobe Taizan - Xue Wen Xi (0) | won| - | |
| Isobe Taizan - Mitsumori Masao (2249) | won| +11 | |
| Isobe Taizan - Xu Bin (0) | won| - | |
| 2293 - 2293 |
| 5th Kanto Renju Emperor Tournament. 1st round (28.11.2004)
|
| Hara Masao (2167) - Isobe Taizan | draw| -8 | |
| Watanabe Tatsuya (2080) - Isobe Taizan | won| +5 | |
| Ono Takayuki (2174) - Isobe Taizan | lost| -24 | |
| Tadokoro Hosai (2103) - Isobe Taizan | lost| -26 | |
| 2315 - 2315 |
| 3rd Shanghai Meijin (18-20.03.2005)
|
| Isobe Taizan - Chen Wenxia (0) | lost| - | |
| Isobe Taizan - Yin Li Cheng (2184) | draw| - | |
| Isobe Taizan - Tao Jun Feng (0) | won| - | |
| Ishitani Shin-ichi (2336) - Isobe Taizan | won| +17 | |
| Isobe Taizan - Ge Lingfeng (1996) | won| - | |
| Isobe Taizan - Yamaguchi Yusui (2530) | won| +25 | |
| Wu Di (2200) - Isobe Taizan | draw| - | |
| 2238 - 2238 |
| Japan WC qalification 2005 (2-3.04.05)
|
| Isobe Taizan - Hara Masao (2122) | won| +7 | |
| Isobe Taizan - Tamura Kazumasa (2233) | won| +10 | |
| Isobe Taizan - Okabe Hiroshi (2507) | won| +22 | |
| Isobe Taizan - Matsuura Hiroshi (2426) | draw| +3 | |
| Isobe Taizan - Sato Kiyotomi (2282) | draw| -3 | |
| Isobe Taizan - Ono Takayuki (2283) | won| +13 | |
| 2238 - 2238 |
| 22nd Kanto Championship (22.05.2005)
|
| Isobe Taizan - Itami Yoshiyuki (2098) | won| +5 | |
| Isobe Taizan - Sasaki Miyu (2016) | won| +3 | |
| Isobe Taizan - Arita Nobuyoshi (2173) | draw| -10 | |
| Isobe Taizan - Nagao Noriaki (2141) | won| +6 | |
| Okabe Hiroshi (2498) - Isobe Taizan | draw| +4 | |
| 2291 - 2291 |
| 6th Kanto Renju Emperor Tournament. 1st round (23.10.2005)
|
| Isobe Taizan - Matsuoka Teruo (1993) | won| +3 | |
| Isobe Taizan - Nagao Noriaki (2155) | won| +6 | |
| Isobe Taizan - Ono Takayuki (2208) | won| +7 | |
| Isobe Taizan - Yamaguchi Yusui (2482) | won| +19 | |
| 2328 - 2328 |
| 6th Kanto Renju Emperor Tournament. Semifinal (23.10.2005)
|
| Yamaguchi Yusui (2474) - Isobe Taizan | lost| -15 | |
| Okabe Hiroshi (2482) - Isobe Taizan | won| +17 | |
| Isobe Taizan - Kamemoto Daichi (2090) | lost| -28 | |
| Isobe Taizan - Sato Kiyotomi (2348) | won| +11 | |
| Isobe Taizan - Koyama Jun (2212) | won| +6 | |
| 2328 - 2328 |
| 4th Shanghai Meijin (18-20.03.2006)
|
| Isobe Taizan - Wu Hao (2300) | draw| -6 | |
| Isobe Taizan - Cao Dong (2447) | lost| - | |
| Isobe Taizan - Takashima Junya (2473) | lost| -15 | |
| Mitsumori Masao (2242) - Isobe Taizan | won| +8 | |
| Isobe Taizan - Zhu Jian Feng (2309) | lost| - | |
| Isobe Taizan - Ge Lingfeng (2125) | won| +4 | |
| Wu Di (2188) - Isobe Taizan | lost| -26 | |
| 2444 - 2409 |
| 1-st All Japan Championship (25-26.03.2006)
|
| Isobe Taizan - Itami Yoshiyuki (2151) | won| +6 | |
| Isobe Taizan - Koyama Jun (2217) | won| +8 | |
| Isobe Taizan - Takashima Junya (2468) | won| +19 | |
| Yamaguchi Yusui (2486) - Isobe Taizan | lost| -12 | |
| Isobe Taizan - Iio Yoshihiro (2352) | lost| -19 | |
| Isobe Taizan - Mitsumori Masao (2210) | won| +8 | |
| 2409 - 2419 |
| 23rd Kanto Championship (28.05.2006)
|
| Nagao Noriaki (2090) - Isobe Taizan | draw| -12 | |
| Isobe Taizan - Ono Takayuki (2285) | won| +10 | |
| Arita Nobuyoshi (2282) - Isobe Taizan | lost| -22 | |
| Koyama Jun (2232) - Isobe Taizan | lost| -24 | |
| Tomobe Katsuhiro (2070) - Isobe Taizan | lost| -28 | |
| 2419 - 2343 |
| 44th Meijinsen Qualification: East Japan 1st round (18.06.2006)
|
| Isobe Taizan - Tanno Yoshitaka (2093) | won| +6 | |
| Sato Kiyotomi (2288) - Isobe Taizan | lost| -19 | |
| Arita Nobuyoshi (2287) - Isobe Taizan | lost| -19 | |
| Isobe Taizan - Iwano Fumio (1975) | won| +3 | |
| 2343 - 2314 |
| 7th Kanto Renju Emperor Tournament. 1st round (15.10.2006)
|
| Isobe Taizan - Tomobe Katsuhiro (2115) | won| +8 | |
| Isobe Taizan - Tadokoro Hosai (1924) | won| +3 | |
| Isobe Taizan - Kato Yasuhiro (2033) | draw| -11 | |
| Isobe Taizan - Kudomi Takahiro (2193) | won| +11 | |
| Sato Kiyotomi (2382) - Isobe Taizan | lost| -13 | |
| 2314 - 2312 |
| 2-nd All Japan Championship (24-25.03.2007)
|
| Isobe Taizan - Tanizaki Ryusuke (2020) | draw| -11 | |
| Isobe Taizan - Tanno Yoshitaka (2104) | won| +7 | |
| Isobe Taizan - Sakamoto Hirouji (2223) | won| +12 | |
| Iio Yoshihiro (2424) - Isobe Taizan | won| +21 | |
| Yamaguchi Yusui (2550) - Isobe Taizan | lost| -6 | |
| Sato Kiyotomi (2392) - Isobe Taizan | lost| -12 | |
| 2312 - 2323 |
| 5th Shanghai Meijin Invitation 1st game (1-3.05.07)
|
| Isobe Taizan - Ge Lingfeng (2202) | lost| -21 | |
| Isobe Taizan - Qiu Yunfei (2441) | lost| -11 | |
| Isobe Taizan - Zhu Jian Feng (2335) | won| +17 | |
| 2323 - 2308 |
| 5th Shanghai Meijin Invitation. Final (1-3.05.07)
|
| Okabe Hiroshi (2511) - Isobe Taizan | draw| +8 | |
| Mitsumori Masao (2190) - Isobe Taizan | draw| -5 | |
| Isobe Taizan - Zhang Yi Feng (1887) | won| - | |
| Isobe Taizan - Ge Chong Yu (2363) | won| +19 | |
| 2308 - 2330 |
| 24th Kanto Championship (06.05.2007)
|
| Isobe Taizan - Nagao Noriaki (2208) | won| +11 | |
| Isobe Taizan - Ono Takayuki (2261) | won| +13 | |
| Kudomi Takahiro (2164) - Isobe Taizan | draw| -7 | |
| Okabe Hiroshi (2482) - Isobe Taizan | lost| -9 | |
| Mitsumori Masao (2171) - Isobe Taizan | lost| -23 | |
| 2330 - 2315 |
| 45th Meijinsen Qualification: East Japan 1st round (17.06.2007)
|
| Isobe Taizan - Tanno Yoshitaka (2104) | won| +7 | |
| Isobe Taizan - Maruta Koji (2115) | won| +8 | |
| Kudomi Takahiro (2214) - Isobe Taizan | draw| -5 | |
| Arita Nobuyoshi (2295) - Isobe Taizan | draw| -1 | |
| 2315 - 2324 |
| 45th Meijinsen Qualification: East Japan Final (8.07.2007)
|
| Sato Kiyotomi (2379) - Isobe Taizan | draw| +3 | |
| Isobe Taizan - Kudomi Takahiro (2255) | draw| -3 | |
| Isobe Taizan - Arita Nobuyoshi (2313) | won| +15 | |
| 2324 - 2339 |
| Meijinsen Tournament 45 (15-17.09.2007)
|
| Yamaguchi Yusui (2536) - Isobe Taizan | lost| -8 | |
| Okabe Hiroshi (2513) - Isobe Taizan | lost| -9 | |
| Oosumi Yuuki (2401) - Isobe Taizan | won| +19 | |
| Iio Yoshihiro (2403) - Isobe Taizan | won| +19 | |
| Kawamura Norihiko (2652) - Isobe Taizan | lost| -5 | |
| Isobe Taizan - Miyoshi Takeo (2238) | draw| -5 | |
| Isobe Taizan - Matsuura Hiroshi (2300) | lost| -18 | |
| Isobe Taizan - Sato Kiyotomi (2400) | won| +19 | |
| Isobe Taizan - Hiwatashi Kikumaro (2029) | won| +5 | |
| 2339 - 2356 |
| 8th Kanto Renju Emperor Tournament. 1st round (28.10.2007)
|
| Isobe Taizan - Maruta Hiroki (1930) | won| +3 | |
| Ono Takayuki (2235) - Isobe Taizan | lost| -21 | |
| Isobe Taizan - Yamamoto Junko (1843) | won| - | |
| Isobe Taizan - Watanabe Yoko (2007) | won| +4 | |
| Isobe Taizan - Kudomi Takahiro (2266) | won| +12 | |
| 2356 - 2354 |
| 8th Kanto Renju Emperor Tournament. 2nd round. (16.12.2007)
|
| Nakamura Shigeru (2822) - Isobe Taizan | lost| -2 | |
| Okabe Hiroshi (2480) - Isobe Taizan | lost| -10 | |
| Ishitani Shin-ichi (2280) - Isobe Taizan | lost| -19 | |
| Ono Takayuki (2266) - Isobe Taizan | won| +12 | |
| Isobe Taizan - Kurata Kiyotaka (2324) | won| +15 | |
| 2354 - 2350 |
| 3-rd All Japan Championship (22-23.03.2008)
|
| Isobe Taizan - Tanizaki Ryusuke (2079) | won| +6 | |
| Isobe Taizan - Kubo Izumi (1949) | won| +3 | |
| Isobe Taizan - Yamaguchi Yusui (2556) | won| +25 | |
| Isobe Taizan - Iio Yoshihiro (2412) | won| +19 | |
| Nakamura Shigeru (2800) - Isobe Taizan | lost| -2 | |
| Isobe Taizan - Okabe Hiroshi (2510) | draw| +7 | |
| 2350 - 2408 |
| 25th Kanto Championship (18.05.2008)
|
| Isobe Taizan - Kobayashi Koichi (2066) | won| +4 | |
| Arita Nobuyoshi (2266) - Isobe Taizan | lost| -22 | |
| Isobe Taizan - Ono Takayuki (2295) | won| +11 | |
| Okabe Hiroshi (2506) - Isobe Taizan | lost| -12 | |
| Isobe Taizan - Kato Yasuhiro (1900) | won| +2 | |
| 2408 - 2391 |
| 46th Meijinsen Qualification: East Japan Final (13.07.2008)
|
| Kawamura Norihiko (2576) - Isobe Taizan | lost| -8 | |
| Sato Kiyotomi (2234) - Isobe Taizan | lost| -23 | |
| Arita Nobuyoshi (2294) - Isobe Taizan | lost| -20 | |
| Isobe Taizan - Koyama Jun (2347) | won| +14 | |
| Isobe Taizan - Nagao Noriaki (2199) | won| +8 | |
| 2391 - 2362 |