18th All-Japan Open Championship — IKO (1986)
17th All-Japan Open Championship — IKO (1985)
16th All-Japan Open Championship — IKO (1984)
22nd All-Japan Open Championship — IKO (1990)
21st All-Japan Open Championship — IKO (1989)
25th All-Japan Open Championship — IKO (1993)
24th All-Japan Open Championship — IKO (1992)
29th All-Japan Open Championship — IKO (1997)
28th All-Japan Open Championship — IKO (1996)
26th All-Japan Open Championship — IKO (1994)
