Kumakawa, Toru
Current rating: 1419
Record: 4-9
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Shibuya, Shun (1538) | Won 2-0 | +211432 |
| 2sealed | 144 | Bramley, John (1520) | Lost 0-2 | -171415 |
| 3sealed | 284 | He, Yuan (1567) | Lost 0-2 | -151400 |
| 4sealed | 328 | Wong, Yin Ming (1455) | Won 2-1 | +191419 |
| average opponent: 1520record: 2-2 | new rating: 1419 | |||
| Grand Prix Taipei 2014 (M15 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 108 | Li, Can (1500) | Won 2-1 | +181518 |
| 2sealed | 2 | Lin, Yi-Tung (1519) | Lost 1-2 | -181500 |
| 3sealed | 276 | Ng, Chong Leng (1560) | Won 2-0 | +191519 |
| 4sealed | 123 | Dai, Dangerguser (1518) | Lost 1-2 | -181501 |
| 5sealed | 298 | Hsu, Ronald (1500) | Lost 0-2 | -181483 |
| 6sealed | 311 | Li, Chien Zen (1517) | Lost 1-2 | -171466 |
| 7sealed | 302 | Huang, Yung-Ling (1490) | Lost 0-2 | -181448 |
| 8sealed | 261 | Yang, Shao-fu (1432) | Lost 0-2 | -181430 |
| 9sealed | 231 | Ojima, Tomohito (1411) | Lost 0-2 | -191411 |
| average opponent: 1494record: 2-7 | new rating: 1411 | |||