| Date |
Tournament |
Black |
White |
Result |
| [1981-12-28] |
7th Japanese Tengen, title match #5 |
Kobayashi Koichi |
Kato Masao |
W+5.5 |
| [1981-12-21] |
7th Japanese Tengen, title match #4 |
Kobayashi Koichi |
Kato Masao |
B+2.5 |
| [1981-12-10] |
7th Japanese Tengen, title match #3 |
Kato Masao |
Kobayashi Koichi |
B+R |
| [1981-12-07] |
29th Japanese Oza, title match #3 |
Kato Masao |
Hashimoto Shoji |
W+R |
| [1981-12-03] |
7th Japanese Tengen, title match #2 |
Kobayashi Koichi |
Kato Masao |
B+R |
| [1981-11-25] |
7th Japanese Tengen, title match #1 |
Kato Masao |
Kobayashi Koichi |
B+3.5 |
| [1981-11-09] |
29th Japanese Oza, title match #2 |
Hashimoto Shoji |
Kato Masao |
W+3.5 |
| [1981-11-05] |
22nd Japanese Okan, title match |
Yamashiro Hiroshi |
Iwata Tatsuaki |
B+2.5 |
| [1981-10-28] |
25th Kansai-Kiin 1st Place, final 3 |
Sekiyama Toshio |
Sato Sunao |
W+R |
| [1981-10-27] |
29th Japanese Oza, title match #1 |
Kato Masao |
Hashimoto Shoji |
W+R |
| [1981-10-14] |
6th Japanese Meijin, title match #4 |
Cho Chikun |
Kato Masao |
B+2.5 |
| [1981-10-07] |
25th Kansai-Kiin 1st Place, final 2 |
Sato Sunao |
Sekiyama Toshio |
W+R |
| [1981-10-01] |
6th Japanese Meijin, title match #3 |
Kato Masao |
Cho Chikun |
W+3.5 |
| [1981-09-30] |
25th Japanese Prime Minister's Cup, final 2 |
Kataoka Satoshi |
Awaji Shuzo |
W+R |
| [1981-09-24] |
6th Japanese Meijin, title match #2 |
Cho Chikun |
Kato Masao |
B+3.5 |
| [1981-09-23] |
25th Kansai-Kiin 1st Place, final 1 |
Sekiyama Toshio |
Sato Sunao |
W+R |
| [1981-09-21] |
25th Japanese Prime Minister's Cup, final 1 |
Awaji Shuzo |
Kataoka Satoshi |
B+R |
| [1981-09-09] |
6th Japanese Meijin, title match #1 |
Kato Masao |
Cho Chikun |
W+1.5 |
| [1981-09-05] |
5th Ryuen Cup, final |
Kobayashi Satoru |
Aragaki Takeshi |
B+R |
| [1981-08-09] |
12th Japanese Shinei Tournament, final |
Hashimoto Yujiro |
Ishida Akira |
W+R |
| [1981-08-03] |
6th Japanese Gosei, title match #4 |
Otake Hideo |
Kato Masao |
B+2.5 |
| [1981-07-28] |
6th Japanese Gosei, title match #3 |
Kato Masao |
Otake Hideo |
B+R |
| [1981-07-18] |
6th Japanese Shinjin O, final 2 |
Hasegawa Sunao |
O Rissei |
W+R |
| [1981-07-16] |
6th Japanese Gosei, title match #2 |
Otake Hideo |
Kato Masao |
B+R |
| [1981-07-15] |
36th Japanese Honinbo, title match #6 |
Cho Chikun |
Takemiya Masaki |
B+3.5 |
| [1981-07-13] |
3rd Japanese Female Kakusei, final |
Kusunoki Teruko |
Kobayashi Reiko |
W+1.5 |
| [1981-07-09] |
6th Japanese Shinjin O, final 1 |
O Rissei |
Hasegawa Sunao |
B+R |
| [1981-07-08] |
36th Japanese Honinbo, title match #5 |
Takemiya Masaki |
Cho Chikun |
B+R |
| [1981-07-08] |
6th Japanese Gosei, title match #1 |
Kato Masao |
Otake Hideo |
W+6.5 |
| [1981-06-23] |
36th Japanese Honinbo, title match #4 |
Cho Chikun |
Takemiya Masaki |
W+R |
| [1981-06-16] |
36th Japanese Honinbo, title match #3 |
Takemiya Masaki |
Cho Chikun |
W+3.5 |
| [1981-06-03] |
36th Japanese Honinbo, title match #2 |
Cho Chikun |
Takemiya Masaki |
B+R |
| [1981-05-26] |
36th Japanese Honinbo, title match #1 |
Takemiya Masaki |
Cho Chikun |
W+R |
| [1981-04-01] |
19th Japanese Judan, title match #3 |
Otake Hideo |
Hashimoto Shoji |
B+R |
| [1981-03-22] |
28th Japanese NHK Cup, final |
Fujisawa Hideyuki |
Takagi Shoichi |
B+R |
| [1981-03-19] |
19th Japanese Judan, title match #2 |
Hashimoto Shoji |
Otake Hideo |
W+0.5 |
| [1981-03-07] |
3rd Japan Asia Airways Cup, final |
Otake Hideo |
Sakata Eio |
B+R |
| [1981-03-04] |
19th Japanese Judan, title match #1 |
Otake Hideo |
Hashimoto Shoji |
B+1.5 |
| [1981-03-01] |
13th Japanese Hayago Championship, final 3 |
Sakata Eio |
Kato Masao |
B+R |
| [1981-02-28] |
3rd Japanese Kakusei, final |
Cho Chikun |
Otake Hideo |
W+6.5 |
| [1981-02-18] |
5th Japanese Kisei, title match #4 |
Fujisawa Hideyuki |
Otake Hideo |
B+R |
| [1981-02-15] |
13th Japanese Hayago Championship, final 2 |
Sakata Eio |
Kato Masao |
B+R |
| [1981-02-04] |
5th Japanese Kisei, title match #3 |
Otake Hideo |
Fujisawa Hideyuki |
W+R |
| [1981-02-01] |
13th Japanese Hayago Championship, final 1 |
Kato Masao |
Sakata Eio |
B+R |
| [1981-01-28] |
5th Japanese Kisei, title match #2 |
Fujisawa Hideyuki |
Otake Hideo |
B+R |
| [1981-01-13] |
5th Japanese Kisei, title match #1 |
Otake Hideo |
Fujisawa Hideyuki |
W+R |
