General
- Name
- Katsu One - Katsuyuki
- Surname
- Ishikawa
- Nationality
- Japan
- Member Id number (MIN)
- 10134794
- Year of birth
- 1981
- Represents
- Japan
- Licenses
-
Breaking Adjudicator
Status: Active
Trivium: Yes
Judging System: Yes
Issued on: 30 July 2021
Education expires on: 12 May 2025
Disciplines: Breaking (A)Breaking Head Judge
Status: Active
Grade: A
Issued on: 21 December 2022
Education expires on: 12 May 2025
Competition history
| Task | Date | Event | Competitions | Location |
|---|---|---|---|---|
| Head Judge | 29 August 2024 | Open | Breaking Mix | Porto, Portugal |
| Head Judge | 3 November 2023 | Continental Games | Breaking Adult Breaking Adult | Santiago de Chile, Chile |
| Head Judge | 27 October 2023 | Continental Championship | Breaking Adult Breaking Adult | Sydney, Australia |
| Head Judge | 26 June 2023 | Continental Games | Breaking Adult Breaking Adult | Nowy Sącz, Poland |
| Head Judge | 27 May 2023 | Continental Championship | Breaking Adult Breaking Adult | Santiago de Chile, Chile |
| Head Judge | 12 May 2023 | Continental Championship | Breaking Adult Breaking Adult | Rabat, Morocco |
| Head Judge | 24 February 2023 | BfG World Series | Breaking Adult Breaking Adult | Kitakyushu, Japan |
| Chairperson | 19 November 2022 | BfG Challenge Series | Breaking Adult Breaking Adult | Tokyo, Japan |
| Adjudicator | 21 October 2022 | World Championship | Breaking Adult Breaking Adult | Seoul, South Korea |
| Adjudicator | 9 July 2022 | IWGA The World Games | Breaking Adult Breaking Adult | Birmingham, United States |
| Chairperson | 26 May 2022 | BfG World Series | Breaking Adult Breaking Adult | Montpellier, France |
| Chairperson | 4 December 2021 | World Championship | Breaking Adult Breaking Adult | Paris, France |