| Date |
Tournament |
Black |
White |
Result |
| [1980-12-08] |
6th Japanese Tengen, title match #3 |
Kato Masao |
Yamabe Toshiro |
B+R |
| [1980-11-26] |
6th Japanese Tengen, title match #2 |
Yamabe Toshiro |
Kato Masao |
W+R |
| [1980-11-19] |
24th Kansai-Kiin 1st Place, final 3 |
Ishii Shinzo |
Hashimoto Utaro |
W+R |
| [1980-11-19] |
28th Japanese Oza, title match #2 |
Kato Masao |
Ishida Yoshio |
B+2.5 |
| [1980-11-12] |
6th Japanese Tengen, title match #1 |
Kato Masao |
Yamabe Toshiro |
B+R |
| [1980-11-05] |
24th Kansai-Kiin 1st Place, final 2 |
Hashimoto Utaro |
Ishii Shinzo |
B+R |
| [1980-11-05] |
5th Japanese Meijin, title match #6 |
Cho Chikun |
Otake Hideo |
B+1.5 |
| [1980-11-05] |
28th Japanese Oza, title match #1 |
Ishida Yoshio |
Kato Masao |
W+R |
| [1980-10-23] |
21st Japanese Okan, title match |
Iwata Tatsuaki |
Baba Shigeru |
B+R |
| [1980-10-22] |
5th Japanese Meijin, title match #5 |
Otake Hideo |
Cho Chikun |
W+R |
| [1980-10-15] |
24th Kansai-Kiin 1st Place, final 1 |
Ishii Shinzo |
Hashimoto Utaro |
B+5.5 |
| [1980-10-08] |
24th Japanese Prime Minister's Cup, final 3 |
O Rissei |
Fukui Masaaki |
W+9.5 |
| [1980-10-08] |
5th Japanese Meijin, title match #4 |
Cho Chikun |
Otake Hideo |
Void |
| [1980-10-01] |
5th Japanese Meijin, title match #3 |
Otake Hideo |
Cho Chikun |
B+R |
| [1980-09-24] |
24th Japanese Prime Minister's Cup, final 2 |
Fukui Masaaki |
O Rissei |
B+2.5 |
| [1980-09-17] |
24th Japanese Prime Minister's Cup, final 1 |
O Rissei |
Fukui Masaaki |
B+R |
| [1980-09-17] |
5th Japanese Meijin, title match #2 |
Cho Chikun |
Otake Hideo |
B+R |
| [1980-09-10] |
5th Japanese Meijin, title match #1 |
Otake Hideo |
Cho Chikun |
W+R |
| [1980-09-06] |
4th Ryuen Cup, final |
Kobayashi Satoru |
Aragaki Takeshi |
B+R |
| [1980-08-27] |
5th Japanese Gosei, title match #4 |
Otake Hideo |
Cho Chikun |
B+R |
| [1980-08-13] |
5th Japanese Gosei, title match #3 |
Cho Chikun |
Otake Hideo |
W+R |
| [1980-08-01] |
5th Japanese Gosei, title match #2 |
Otake Hideo |
Cho Chikun |
B+1.5 |
| [1980-07-23] |
5th Japanese Gosei, title match #1 |
Cho Chikun |
Otake Hideo |
B+4.5 |
| [1980-07-10] |
5th Japanese Shinjin O, final 2 |
Kiyonari Tetsuya |
Miyazawa Goro |
W+5.5 |
| [1980-07-08] |
11th Japanese Shinei Tournament, final |
Kori Toshio |
Awaji Shuzo |
W+R |
| [1980-07-04] |
35th Japanese Honinbo, title match #5 |
Kato Masao |
Takemiya Masaki |
W+R |
| [1980-07-02] |
5th Japanese Shinjin O, final 1 |
Miyazawa Goro |
Kiyonari Tetsuya |
B+3.5 |
| [1980-06-18] |
35th Japanese Honinbo, title match #4 |
Takemiya Masaki |
Kato Masao |
B+R |
| [1980-06-11] |
35th Japanese Honinbo, title match #3 |
Kato Masao |
Takemiya Masaki |
B+R |
| [1980-05-28] |
35th Japanese Honinbo, title match #2 |
Takemiya Masaki |
Kato Masao |
B+R |
| [1980-05-26] |
2nd Japanese Female Kakusei, final |
Suzuki Tsuna |
Sugiuchi Kazuko |
B+11.5 |
| [1980-05-15] |
35th Japanese Honinbo, title match #1 |
Kato Masao |
Takemiya Masaki |
W+1.5 |
| [1980-04-14] |
18th Japanese Judan, title match #5 |
Kato Masao |
Otake Hideo |
W+0.5 |
| [1980-04-09] |
18th Japanese Judan, title match #4 |
Otake Hideo |
Kato Masao |
W+R |
| [1980-04-01] |
18th Japanese Judan, title match #3 |
Kato Masao |
Otake Hideo |
B+R |
| [1980-03-12] |
18th Japanese Judan, title match #2 |
Otake Hideo |
Kato Masao |
B+2.5 |
| [1980-03-09] |
27th Japanese NHK Cup, final |
Hashimoto Shoji |
Cho Chikun |
B+2.5 |
| [1980-03-08] |
2nd Japan Asia Airways Cup, final |
Ishida Yoshio |
Sakata Eio |
W+R |
| [1980-03-05] |
18th Japanese Judan, title match #1 |
Kato Masao |
Otake Hideo |
W+4.5 |
| [1980-03-02] |
12th Japanese Hayago Championship, final 3 |
Ishida Yoshio |
Otake Hideo |
B+1.5 |
| [1980-02-27] |
4th Japanese Kisei, title match #5 |
Fujisawa Hideyuki |
Rin Kaiho |
B+4.5 |
| [1980-02-20] |
4th Japanese Kisei, title match #4 |
Rin Kaiho |
Fujisawa Hideyuki |
W+R |
| [1980-02-17] |
12th Japanese Hayago Championship, final 2 |
Ishida Yoshio |
Otake Hideo |
W+R |
| [1980-02-05] |
4th Japanese Kisei, title match #3 |
Fujisawa Hideyuki |
Rin Kaiho |
W+R |
| [1980-02-03] |
12th Japanese Hayago Championship, final 1 |
Otake Hideo |
Ishida Yoshio |
W+2.5 |
| [1980-01-30] |
4th Japanese Kisei, title match #2 |
Rin Kaiho |
Fujisawa Hideyuki |
W+0.5 |
| [1980-01-16] |
4th Japanese Kisei, title match #1 |
Fujisawa Hideyuki |
Rin Kaiho |
B+R |
