10-dan title
11 1975
Yasuharu Ooyama vs Makoto Nakahara (123 moves)
Round 1
Round 1
Makoto Nakahara vs Yasuharu Ooyama (129 moves)
Round 2
Round 2
Yasuharu Ooyama vs Makoto Nakahara (145 moves)
Round 3
Round 3