| Competition | City | Date | Roles |
|---|
| 1 | Tokyo Regional Championships 2022 | Nishitokyo | 2022-09-30 | Judge (Senior ladies, Advanced novice girls, Intermediate novice boys) |
| 2 | Japan Championships 2021 | Saitama | 2021-12-22 | Judge (Senior ladies) |
| 3 | Eastern Section Championships 2021 | Tokyo | 2021-10-28 | Judge (Senior ladies, Junior men) |
| 4 | Japan Championships 2019 | Tokyo | 2019-12-18 | Judge (Senior ladies) |
| 5 | Tokyo Regional Championships 2019 | Nishitokyo | 2019-09-20 | Judge (Senior men, Junior ladies, Intermediate novice girls) |
| 6 | Japan Championships 2017 | Tokyo | 2017-12-19 | Judge (Senior ladies) |
| 7 | Eastern Section Championships 2017 | Yamanashi | 2017-10-26 | Judge (Senior men, Junior ladies) |
| 8 | Japan Championships 2016 | Osaka | 2016-12-22 | Judge (Senior ladies) |
| 9 | Japan Championships 2015 | Hokkaido | 2015-12-24 | Judge (Senior ladies) |
| 10 | Japan Championships 2014 | Nagano | 2014-12-25 | Judge (Senior men) |
| 11 | Eastern Section Championships 2014 | Chiba | 2014-10-30 | Judge (Senior men, Junior ladies) |
| 12 | Eastern Section Championships 2013 | Gunma | 2013-11-01 | Judge (Senior ladies, Junior men) |
| 13 | Tokyo Regional Championships 2013 | Tokyo | 2013-10-03 | Judge (Senior ladies, Senior men, Advanced novice girls, Basic novice B girls) |
| 14 | Japan Junior Championships 2012 | Nishitōkyō, Tokyo | 2012-11-17 | Judge (Junior ladies) |
| 15 | Tokyo Regional Championships 2012 | Tokyo | 2012-10-05 | Judge (Senior men, Junior ladies, Junior men) |
| 16 | Japan Novice Championships 2011 | Tokyo | 2011-10-28 | Judge (Advanced novice boys, Advanced novice girls) |
| 17 | Japan Junior Championships 2010 | Hitachinaka | 2010-11-26 | Judge (Junior ladies) |
| 18 | Japan Junior Championships 2009 | Yokohama | 2009-11-21 | Judge (Junior men) |
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