| Competition | City | Date | Roles |
|---|
| 1 | Japan Novice Championships 2023 | Tokyo | 2023-10-20 | Judge (Advanced novice girls, Intermediate novice boys) |
| 2 | Chubu Regional Championships 2022 | Nagoya | 2022-09-23 | Judge (Senior ladies, Senior men, Junior men, Intermediate novice girls) |
| 3 | Western Section Championships 2021 | Fukuoa | 2021-11-04 | Judge (Senior ladies, Junior men) |
| 4 | Chubu Regional Championships 2021 | Nagoya | 2021-09-24 | Judge (Junior ladies, Advanced novice girls, Advanced novice boys) |
| 5 | Japan Novice Championships 2020 | Gunma | 2020-10-24 | Judge (Advanced novice girls, Intermediate novice boys) |
| 6 | Japan Novice Championships 2019 | Nishitokyo | 2019-10-18 | Judge (Advanced novice boys, Intermediate novice girls) |
| 7 | Japan Junior Championships 2018 | Fukuoka | 2018-11-23 | Judge (Junior ladies) |
| 8 | Western Section Championships 2018 | Aichi-ken | 2018-11-01 | Judge (Senior men, Junior ladies) |
| 9 | Japan Junior Championships 2017 | Gunma | 2017-11-24 | Judge (Junior ladies) |
| 10 | Shu-Shikoku-Kyushu Regional Championships 2017 | Fukuoka | 2017-10-06 | Referee (Senior men, Junior men, Advanced novice girls, Basic novice B boys, Basic novice B girls)
|
| 11 | Japan Junior Championships 2016 | Sapporo | 2016-11-18 | Judge (Junior ladies) |
| 12 | Japan Novice Championships 2016 | Osaka | 2016-10-21 | Judge (Advanced novice girls, Advanced novice boys) |
| 13 | Shu-Shikoku-Kyushu Regional Championships 2016 | Okayama | 2016-09-23 | Referee (Senior men, Junior men, Advanced novice girls, Basic novice B girls, Basic novice B boys)
|
| 14 | Japan Championships 2015 | Hokkaido | 2015-12-24 | Judge (Senior men) |
| 15 | Japan Novice Championships 2015 | Tokyo | 2015-10-23 | Judge (Advanced novice girls, Advanced novice boys) |
| 16 | Japan Championships 2014 | Nagano | 2014-12-25 | Judge (Senior ladies) |
| 17 | Japan Novice Championships 2014 | Osaka | 2014-10-24 | Judge (Basic novice B boys, Basic novice B girls) |
| 18 | Shu-Shikoku-Kyushu Regional Championships 2014 | Okayama | 2014-09-25 | Referee (Junior men, Junior ladies, Advanced novice girls)
|
| 19 | Japan Championships 2013 | Saitama | 2013-12-20 | Judge (Senior men) |
| 20 | Japan Junior Championships 2013 | Nagoya | 2013-11-22 | Judge (Junior ladies) |
| 21 | Japan Junior Championships 2012 | Nishitōkyō, Tokyo | 2012-11-17 | Judge (Junior ladies) |
| 22 | Kinki Regional Championships 2012 | Shiga | 2012-10-05 | Referee (Senior men, Junior ladies, Advanced novice girls)
|
| 23 | Japan Championships 2011 | Kadoma | 2011-12-22 | Judge (Senior men) |
| 24 | Japan Novice Championships 2011 | Tokyo | 2011-10-28 | Judge (Advanced novice boys, Advanced novice girls) |
| 25 | Japan Junior Championships 2010 | Hitachinaka | 2010-11-26 | Judge (Junior ladies) |
| 26 | Japan Junior Championships 2009 | Yokohama | 2009-11-21 | Judge (Junior men) |
| 27 | Japan Championships 2008 | Nagano | 2008-12-25 | Judge (Senior ladies) |
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