5 Dan
Rubikun 
| Country/Region |  Japan |
|---|---|
| TopCoder ID | Rubikun |
| Codeforces ID | Rubikun |
| Affiliation | blessing software |
Contest Status
| Rank | 81st |
|---|---|
| Rating | 2871 |
| Highest Rating | 2938 ― 5 Dan (+62 to promote) |
| Rated Matches | 134 |
| Last Competed | 2025/12/28 |