Games Between Two Players
O Meien (3 win; 0 loss) vs. Oya Koichi
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2015-11-07] 2nd Japanese OVER40 Hayago Tournament, semi-final
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| O Meien 9p | Oya Koichi 9p | B+R |  |
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| [2008-12-18] 34th Japanese Gosei, round 1
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| O Meien 9p | Oya Koichi 9p | B+13.5 | |
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| [1997-08-07] 53rd Japanese Honinbo, preliminary
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| Oya Koichi 8p | O Meien 9p | W+R | |
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