Games Between Two Players
Kato Masao (8 win; 7 loss) vs. Hikosaka Naoto
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2002-06-20] 27th Japanese Meijin, league
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| Hikosaka Naoto 9p | Kato Masao 9p | B+3.5 |  |
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| [2000-11-09] 26th Japanese Gosei, round 1
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| Hikosaka Naoto 9p | Kato Masao 9p | W+R | |
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| [1999-10-30] 19th Japanese NEC Cup, round 2
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| Kato Masao 9p | Hikosaka Naoto 9p | B+R | |
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| [1999-05-17] 8th Japanese Ryusei, group stage
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| Kato Masao 9p | Hikosaka Naoto 9p | B+2.5 | |
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| [1998-04-23] 36th Japanese Judan, title match #5
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| Kato Masao 9p | Hikosaka Naoto 9p | W+1.5 | |
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| [1998-04-16] 36th Japanese Judan, title match #4
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| Hikosaka Naoto 9p | Kato Masao 9p | W+R | |
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| [1998-04-08] 36th Japanese Judan, title match #3
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| Kato Masao 9p | Hikosaka Naoto 9p | W+4.5 | |
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| [1998-03-24] 36th Japanese Judan, title match #2
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| Hikosaka Naoto 9p | Kato Masao 9p | B+3.5 | |
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| [1998-03-12] 53rd Japanese Honinbo, league
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| Kato Masao 9p | Hikosaka Naoto 9p | W+R | |
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| [1998-03-05] 36th Japanese Judan, title match #1
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| Kato Masao 9p | Hikosaka Naoto 9p | B+4.5 | |
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| [1997-01-30] 52nd Japanese Honinbo, league
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| Hikosaka Naoto 9p | Kato Masao 9p | W+R | |
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| [1996-05-23] 35th Japanese Judan, winner section round 1
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| Kato Masao 9p | Hikosaka Naoto 9p | B+R | |
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| [1987-06-25] 13th Japanese Tengen, round 2
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| Kato Masao 9p | Hikosaka Naoto 7p | B+R | |
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| [1984-11-15] 10th Japanese Gosei, round 1
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| Hikosaka Naoto 6p | Kato Masao 9p | B+0.5 | |
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| [1983-09-29] 9th Japanese Tengen, semi-final
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| Kato Masao 9p | Hikosaka Naoto 6p | W+0.5 | |
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