32nd All-Japan Open Championship — IKO (2000)
33rd All-Japan Open Championship — IKO (2001)
36th All-Japan Open Championship — IKO (2004)
34th All-Japan Open Championship — IKO (2002)
37th All-Japan Open Championship — IKO (2005)
38th All-Japan Open Championship — IKO (2006)
40th All-Japan Open Championship — IKO (2008)
41st All-Japan Open Championship — IKO (2009)
42nd All-Japan Open Championship — IKO (2010)
44th All-Japan Open Championship — IKO (2012)
