Yasuharu Ooyama

大山康晴

Yasuharu Ooyama vs Makoto Nakahara (122 moves)
10-dan title, Round 1, 11 1975
Makoto Nakahara vs Yasuharu Ooyama (128 moves)
10-dan title, Round 2, 18 1975
Yasuharu Ooyama vs Makoto Nakahara (144 moves)
10-dan title, Round 3, 5 1975
Kunio Yonenaga vs Yasuharu Ooyama (101 moves)
23 1982