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)
32nd All-Japan Open Championship — IKO (2000)
30th All-Japan Open Championship — IKO (1998)
36th All-Japan Open Championship — IKO (2004)
34th All-Japan Open Championship — IKO (2002)
