Games Between Two Players
O Rissei (4 win; 0 loss) vs. Hasegawa Sunao
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2001-10-25] 27th Japanese Meijin, preliminary
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| O Rissei 9p | Hasegawa Sunao 9p | B+R |  |
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| [1987-05-28] 12th Japanese Kisei, 8 dan group final
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| O Rissei 8p | Hasegawa Sunao 9p | B+R | |
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| [1981-07-18] 6th Japanese Shinjin O, final 2
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| Hasegawa Sunao 7p | O Rissei 6p | W+R | |
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| [1981-07-09] 6th Japanese Shinjin O, final 1
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| O Rissei 6p | Hasegawa Sunao 7p | B+R | |
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