| Yamabe Toshiro | Yamabe Toshiro B+2.5 1980-03-06 |
Yamabe Toshiro B+R 1980-05-22 |
Yamabe Toshiro W+R 1980-07-31 |
Yamabe Toshiro B+R 1980-10-09 |
Yamabe Toshiro B+T 1980-10-23 |
| Awaji Shuzo | |||||
| Hashimoto Yoshimi | Hashimoto Yoshimi B+R 1980-02-21 |
||||
| Kishimoto Kazuo | |||||
| Sato Sunao | Sato Sunao W+R 1980-02-27 |
Sato Sunao W+R 1980-05-07 |
|||
| Tsuchida Masamitsu | |||||
| Haruyama Isamu | Haruyama Isamu W+0.5 1980-02-21 |
||||
| Hisai Keishi | |||||
| Honda Kunihisa | Honda Kunihisa W+0.5 1980-03-06 |
Honda Kunihisa B+R 1980-07-17 |
Honda Kunihisa B+R 1980-09-18 |
||
| Kawamoto Noboru | |||||
| Otake Hideo | Otake Hideo B+R 1980-05-29 |
||||
| Kudo Norio | |||||
| Kubouchi Shuchi | Kubouchi Shuchi W+R 1980-02-28 |
Kubouchi Shuchi W+R 1980-05-08 |
|||
| Hayase Hiroshi | |||||
| Ohira Shuzo | Ohira Shuzo B+R 1980-03-20 |
||||
| Takagi Shoichi | |||||
| Ushinohama Satsuo | Ushinohama Satsuo B+R 1980-03-06 |
Ushinohama Satsuo B+2.5 1980-07-24 |
Ushinohama Satsuo B+R 1980-08-21 |
Ushinohama Satsuo W+2.5 1980-09-25 |
|
| O Rissei | |||||
| Takemiya Masaki | Takemiya Masaki B+R 1980-04-03 |
||||
| Kojima Takaho | |||||
| Ishii Kunio | Ishii Kunio W+3.5 1980-03-13 |
Ishii Kunio W+1.5 1980-07-24 |
|||
| Chino Tadahiko | |||||
| Hashimoto Utaro | Hashimoto Utaro B+2.5 1980-04-24 |
||||
| Kataoka Satoshi | |||||
| Rin Kaiho | Rin Kaiho | Rin Kaiho W+R 1980-06-12 |
Rin Kaiho B+R 1980-08-28 |
||
| Kanashima Tadashi | |||||
| Cho Chikun | Cho Chikun B+R 1980-05-01 |
||||
| Fujisawa Shuko | |||||
| Takagawa Shukaku | Takagawa Shukaku B+R 1980-05-08 |
Takagawa Shukaku B+R 1980-07-10 |
|||
| Hane Yasumasa | |||||
| Ishii Shinzo | Ishii Shinzo W+R 1980-02-14 |
||||
| Sato Masaharu |
The Challenger's final was unexpectedly cut short: During the dinner break, Ushinohama had fallen asleep in one of the bedrooms on the 8th floor of the Nihon Ki-in and could not be located to resume the game, and he lost on time.
| date | black | white | result | #mv | sgf |
|---|---|---|---|---|---|
| 1980-11-12 | Kato Masao | Yamabe Toshiro | B+R | 125 | sgf |
| 1980-11-26 | Yamabe Toshiro | Kato Masao | W+R | 212 | sgf |
| 1980-12-08 | Kato Masao | Yamabe Toshiro | B+R | 137 | sgf |
Kato Masao won 3-0.