Games Between Two Players
Yamashita Keigo (10 win; 3 loss) vs. Hikosaka Naoto
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2016-10-27] 55th Japanese Judan, round 2
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| Hikosaka Naoto 9p | Yamashita Keigo 9p | W+R |  |
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| [2012-04-05] 37th Japanese Gosei, semi-final
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| Yamashita Keigo 9p | Hikosaka Naoto 9p | B+R | |
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| [2011-10-30] 59th Japanese NHK Cup, round 2
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| Yamashita Keigo 9p | Hikosaka Naoto 9p | W+4.5 | |
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| [2010-11-04] 36th Japanese Gosei, round 1
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| Yamashita Keigo 9p | Hikosaka Naoto 9p | B+R | |
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| [2009-09-27] 57th Japanese NHK Cup, round 2
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| Hikosaka Naoto 9p | Yamashita Keigo 9p | W+R | |
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| [2009-08-27] 48th Japanese Judan, loser section round 2
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| Hikosaka Naoto 9p | Yamashita Keigo 9p | W+R | |
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| [2007-05-03] 32nd Japanese Meijin, league
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| Hikosaka Naoto 9p | Yamashita Keigo 9p | B+R | |
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| [2005-07-28] 44th Japanese Judan, winner section round 2
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| Yamashita Keigo 9p | Hikosaka Naoto 9p | B+R | |
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| [2005-02-01] 14th Japanese Ryusei, group stage
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| Hikosaka Naoto 9p | Yamashita Keigo 9p | W+R | |
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| [2002-03-07] 27th Japanese Meijin, league
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| Hikosaka Naoto 9p | Yamashita Keigo 7p | W+R | |
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| [2001-06-16] 21st Japanese NEC Cup, round 1
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| Hikosaka Naoto 9p | Yamashita Keigo 7p | B+6.5 | |
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| [2000-04-27] 25th Japanese Gosei, semi-final
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| Yamashita Keigo 6p | Hikosaka Naoto 9p | B+R | |
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| [1999-07-22] 38th Japanese Judan, winner section round 2
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| Hikosaka Naoto 9p | Yamashita Keigo 6p | W+4.5 | |
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