Games Between Two Players
Kato Masao (24 win; 9 loss) vs. Ishida Yoshio
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [1999-05-12] 47th Japanese Oza, round 1
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| Ishida Yoshio 9p | Kato Masao 9p | W+R |  |
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| [1995-11-16] 44th Japanese Oza, preliminary
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| Kato Masao 9p | Ishida Yoshio 9p | B+5.5 | |
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| [1993-03-07] 40th Japanese NHK Cup, semi-final
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| Kato Masao 9p | Ishida Yoshio 9p | B+R | |
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| [1991-02-16] 10th Japanese NEC Cup, semi-final
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| Kato Masao 9p | Ishida Yoshio 9p | B+2.5 | |
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| [1989-08-17] 28th Japanese Judan, loser section round 1
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| Kato Masao 9p | Ishida Yoshio 9p | W+1.5 | |
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| [1989-04-06] 14th Japanese Meijin, league
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| Kato Masao 9p | Ishida Yoshio 9p | B+R | |
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| [1986-12-04] 25th Japanese Judan, winner section final
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| Kato Masao 9p | Ishida Yoshio 9p | B+6.5 | |
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| [1986-02-23] 33rd Japanese NHK Cup, round 4
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| Ishida Yoshio 9p | Kato Masao 9p | W+6.5 | |
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| [1986-01-16] 11th Japanese Gosei, round 2
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| Ishida Yoshio 9p | Kato Masao 9p | B+1.5 | |
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| [1985-03-17] 32nd Japanese NHK Cup, semi-final
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| Kato Masao 9p | Ishida Yoshio 9p | W+2.5 | |
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| [1984-09-13] 23rd Japanese Judan, winner section round 2
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| Kato Masao 9p | Ishida Yoshio 9p | W+R | |
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| [1982-07-15] 30th Japanese Oza, round 2
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| Kato Masao 9p | Ishida Yoshio 9p | B+R | |
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| [1981-06-04] 6th Japanese Gosei, challenger decision match #2
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| Kato Masao 9p | Ishida Yoshio 9p | B+R | |
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| [1981-05-28] 6th Japanese Gosei, challenger decision match #1
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| Ishida Yoshio 9p | Kato Masao 9p | W+R | |
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| [1981-02-14] 3rd Japanese Kakusei, league
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| Kato Masao 9p | Ishida Yoshio 9p | B+7.5 | |
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| [1980-11-19] 28th Japanese Oza, title match #2
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| Kato Masao 9p | Ishida Yoshio 9p | B+2.5 | |
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| [1980-11-05] 28th Japanese Oza, title match #1
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| Ishida Yoshio 9p | Kato Masao 9p | W+R | |
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| [1979-11-07] 27th Japanese Oza, title match #2
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| Kato Masao 9p | Ishida Yoshio 9p | B+3.5 | |
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| [1979-10-24] 27th Japanese Oza, title match #1
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| Ishida Yoshio 9p | Kato Masao 9p | W+R | |
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| [1979-03-29] 4th Japanese Meijin, league
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| Kato Masao 9p | Ishida Yoshio 9p | B+R | |
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| [1978-07-31] 33rd Japanese Honinbo, title match #7
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| Ishida Yoshio 9p | Kato Masao 9p | W+R | |
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| [1978-07-10] 33rd Japanese Honinbo, title match #6
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| Kato Masao 9p | Ishida Yoshio 9p | W+3.5 | |
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| [1978-06-28] 33rd Japanese Honinbo, title match #5
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| Ishida Yoshio 9p | Kato Masao 9p | B+5.5 | |
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| [1978-06-21] 33rd Japanese Honinbo, title match #4
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| Kato Masao 9p | Ishida Yoshio 9p | B+3.5 | |
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| [1978-06-15] 3rd Japanese Meijin, league
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| Kato Masao 9p | Ishida Yoshio 9p | B+2.5 | |
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| [1978-05-31] 33rd Japanese Honinbo, title match #3
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| Ishida Yoshio 9p | Kato Masao 9p | B+0.5 | |
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| [1978-05-24] 33rd Japanese Honinbo, title match #2
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| Kato Masao 9p | Ishida Yoshio 9p | B+2.5 | |
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| [1978-05-15] 33rd Japanese Honinbo, title match #1
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| Ishida Yoshio 9p | Kato Masao 9p | W+R | |
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| [1977-02-03] 32nd Japanese Honinbo, league
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| Kato Masao 8p | Ishida Yoshio 9p | W+1.5 | |
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| [1976-12-02] 2nd Japanese Meijin, league
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| Kato Masao 8p | Ishida Yoshio 9p | B+R | |
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| [1975-12-18] 14th Japanese Judan, winner section semi-final
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| Ishida Yoshio 9p | Kato Masao 8p | W+6.5 | |
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| [1973-12-06] 12th Japanese Judan, winner section semi-final
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| Kato Masao 8p | Ishida Yoshio 8p | W+R | |
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| [1970-11-25] 26th Japanese Honinbo, league
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| Kato Masao 6p | Ishida Yoshio 7p | B+1.5 | |
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