| Competition | City | Date | Roles |
|---|
| 1 | Tokyo Regional Championships 2015 | Tokyo | 2015-09-24 | Judge (Senior ladies, Junior men, Advanced novice boys, Basic novice B girls) |
| 2 | Japan Novice Championships 2014 | Osaka | 2014-10-24 | Judge (Basic novice B girls, Basic novice B boys) |
| 3 | Japan Junior Championships 2013 | Nagoya | 2013-11-22 | Judge (Junior men) |
| 4 | Japan Novice Championships 2013 | Ibaraki | 2013-10-25 | Judge (Advanced novice boys, Advanced novice girls) |
| 5 | Tokyo Regional Championships 2013 | Tokyo | 2013-10-03 | Judge (Senior ladies, Senior men, Advanced novice girls, Basic novice B girls) |
| 6 | Kanto Regional Championships 2012 | Yamanashi | 2012-09-27 | Referee (Junior ladies, Basic novice B girls)
|
| 7 | Japan Junior Championships 2011 | Hachinohe | 2011-11-25 | Judge (Junior ladies) |
| 8 | Japan Novice Championships 2011 | Tokyo | 2011-10-28 | Judge (Basic novice B girls, Basic novice B boys) |
| 9 | Japan Junior Championships 2010 | Hitachinaka | 2010-11-26 | Judge (Junior men) |
| 10 | Japan Championships 2009 | Osaka | 2009-12-25 | Judge (Senior ladies) |
| 11 | Japan Junior Championships 2009 | Yokohama | 2009-11-21 | Judge (Junior ladies) |
| 12 | Japan Championships 2008 | Nagano | 2008-12-25 | Judge (Senior men) |
| 13 | Japan Championships 2007 | Kadoma | 2007-12-26 | Judge (Senior men) |
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