Games Between Two Players
Yamada Kimio (0 win; 3 loss) vs. Oya Koichi
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2005-12-05] 15th Japanese Ryusei, group stage
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| Oya Koichi 9p | Yamada Kimio 8p | B+R |  |
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| [2000-12-07] 56th Japanese Honinbo, league
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| Oya Koichi 8p | Yamada Kimio 8p | B+1.5 | |
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| [1994-03-17] 19th Japanese Gosei, round 2
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| Yamada Kimio 6p | Oya Koichi 7p | W+12.5 | |
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