| Competition | City | Date | Roles |
|---|
| 1 | Eastern Section Championships 2013 | Gunma | 2013-11-01 | Judge (Senior ladies, Junior men) |
| 2 | Eastern Section Championships 2012 | Chiba | 2012-11-01 | Judge (Senior ladies, Junior men) |
| 3 | Tokyo Regional Championships 2012 | Tokyo | 2012-10-05 | Referee (Senior ladies, Advanced novice boys, Advanced novice girls, Basic novice B girls, Basic novice B boys)
|
| 4 | Eastern Section Championships 2011 | Yamanashi | 2011-11-03 | Judge (Senior ladies, Junior men) |
| 5 | Tohoku-Hokkaido Regional Championships 2011 | Aomori | 2011-10-12 | Referee (Junior ladies, Advanced novice boys, Basic novice B boys, Basic novice B girls)
|
| 6 | Japan Junior Championships 2010 | Hitachinaka | 2010-11-26 | Judge (Junior ladies) |
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