Games Between Two Players
Kobayashi Koichi (9 win; 10 loss) vs. Hikosaka Naoto
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2020-06-18] 45th Japanese Kisei, league C
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | W+5.5 |  |
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| [2015-03-26] 5th Japanese Igo Masters Cup, round 1
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | B+1.5 | |
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| [2015-03-05] 24th Japanese Ryusei, group stage
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | B+3.5 | |
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| [2008-11-23] 56th Japanese NHK Cup, round 2
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | B+3.5 | |
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| [2006-02-16] 45th Japanese Judan, preliminary
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | W+7.5 | |
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| [2005-06-07] 14th Japanese Ryusei, round 1
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | B+1.5 | |
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| [2004-02-05] 30th Japanese Tengen, round 1
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | W+2.5 | |
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| [2002-06-13] 41st Japanese Judan
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | W+4.5 | |
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| [1999-09-23] 24th Japanese Kisei, semi-final
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | W+6.5 | |
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| [1999-05-27] 24th Japanese Gosei, challenger decision match
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | W+R | |
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| [1999-04-08] 37th Japanese Judan, title match #3
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | W+R | |
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| [1999-03-25] 37th Japanese Judan, title match #2
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | B+2.5 | |
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| [1999-03-04] 37th Japanese Judan, title match #1
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | W+0.5 | |
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| [1998-02-26] 23rd Japanese Gosei, round 2
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | B+R | |
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| [1997-08-06] 36th Japanese Judan, loser section round 2
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| Hikosaka Naoto 9p | Kobayashi Koichi 9p | B+3.5 | |
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| [1996-06-13] 44th Japanese Oza, round 2
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | B+0.5 | |
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| [1994-09-01] 19th Japanese Kisei, round 2
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| Kobayashi Koichi 9p | Hikosaka Naoto 9p | B+4.5 | |
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| [1989-03-09] 15th Japanese Tengen, round 1
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| Hikosaka Naoto 7p | Kobayashi Koichi 9p | W+R | |
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| [1983-09-01] 9th Japanese Tengen, round 3
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| Kobayashi Koichi 9p | Hikosaka Naoto 6p | W+1.5 | |
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