Joo, On Young
Current rating: 1520
Record: 4-3
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 94 | Itou, Kenshirou (1605) | Lost 0-2 | -161484 |
| 2sealed | 176 | Kamakura, Takahiro (1482) | Won 2-0 | +181502 |
| 3sealed | 84 | Kiyohara, Yoichi (1500) | Lost 0-2 | -181484 |
| 4sealed | 138 | Ishibashi, Akitomo (1483) | Lost 0-2 | -181466 |
| 5sealed | 158 | Fujitani, Kazumasa (1464) | Won 2-0 | +181484 |
| 6sealed | 131 | Karakawa, Toshimitsu (1483) | Won 2-0 | +181502 |
| 7sealed | 89 | Miyazawa, Hisashi (1499) | Won 2-0 | +181520 |
| average opponent: 1502record: 4-3 | new rating: 1520 | |||