Koizumi, Mio
Current rating: 1436
Record: 7-11
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Kido, Katsunori (1410) | Won 2-0 | +171465 |
| 2sealed | 192 | Okamura, Sota (1518) | Won 2-1 | +191484 |
| 3sealed | 142 | Ou, Kaitou (1564) | Lost 0-2 | -171467 |
| 4sealed | 247 | Asanuma, Hodaka (1532) | Lost 1-2 | -161451 |
| 5sealed | 311 | Inoue, Masashi (1521) | Lost 0-2 | -171434 |
| 6sealed | 343 | Kobayashi, Ryousuke308 (1486) | Won 2-0 | +191453 |
| 7sealed | 253 | Tezuka, Takatomo (1474) | Lost 1-2 | -181435 |
| 8sealed | 230 | Seguchi, Shinichirou (1429) | Won 2-0 | +181453 |
| 9sealed | 172 | Andou, Ryou (1518) | Lost 1-2 | -171436 |
| average opponent: 1495record: 4-5 | new rating: 1436 | |||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 149 | Suzuki, Fumito (1659) | Won 2-0 | +211521 |
| 2sealed | 168 | Oumi, Syuntaro (1490) | Lost 0-2 | -191502 |
| 3sealed | 390 | Matsumura, Kentarou (1515) | Lost 0-2 | -171485 |
| 4sealed | 422 | Yoshida, Kazuhiro (1483) | Won 2-1 | +181503 |
| 5sealed | 350 | Shang, Shuwen (1454) | Lost 0-2 | -191484 |
| 6sealed | 319 | Honjo, Shuya (1481) | Lost 0-2 | -181466 |
| 7sealed | 294 | Inoue, Seiya (1462) | Lost 0-2 | -181448 |
| 8sealed | 247 | Suzuki, Kenta (1482) | Lost 1-2 | -181430 |
| 9sealed | 199 | Kamal, Ahmad Hilmi Mustaffa (1405) | Won 2-0 | +181448 |
| average opponent: 1492record: 3-6 | new rating: 1448 | |||