Iwatou, Kodai
Current rating: 1473
Record: 17-21-1
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1395 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 9 | Tokitsu, Hiroshi (1519) | Lost 0-2 | -161379 |
| 2pioneer | 407 | Takase, Junpei (1365) | Won 2-1 | +181397 |
| 3pioneer | 674 | Tamura, Yuta (1478) | Won 2-1 | +201417 |
| 4pioneer | 549 | Taniyama, Toshiaki (1490) | Won 2-0 | +191436 |
| 5pioneer | 235 | Yajima, Hiromichi (1464) | Draw 1-1 | 01436 |
| 6pioneer | 252 | Nakashima, Atsushi (1881) | Won 2-1 | +261462 |
| 7pioneer | 153 | Tachibana, Kentarou (1735) | Won 2-0 | +231485 |
| 8pioneer | 89 | Fukuoka, Sou (1852) | Lost 0-2 | -121473 |
| top | average opponent: 1598record: 5-2-1 | new rating: 1473 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1424 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 425 | Hayamizu, Akira (1500) | Lost 1-2 | -171407 |
| 2standard | 879 | Ishii, Masashi (1471) | Won 2-0 | +191426 |
| 3standard | 856 | Tedori, Kota (1592) | Lost 1-2 | -151411 |
| 4standard | 826 | Murahata, Hiroyuki (1501) | Lost 0-2 | -161395 |
| top | average opponent: 1516record: 1-3 | new rating: 1395 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 364 | Kamidani, Takehiro (1495) | Lost 1-2 | -171461 |
| 2modern | 674 | Hayase, Kai (1482) | Won 2-0 | +181479 |
| 3modern | 909 | Inukai, Masahiro (1498) | Lost 0-2 | -181461 |
| 4modern | 1154 | Uchiyama, Daichi (1406) | Lost 0-2 | -191442 |
| 5modern | 1138 | Katsu, Masahiro (1415) | Lost 1-2 | -181424 |
| top | average opponent: 1459record: 1-4 | new rating: 1424 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 176 | Suzuki, Uta (1471) | Won 2-1 | +181502 |
| 4standard | 12 | Morishita, Mizuki (1813) | Won 2-0 | +241526 |
| 5standard | 2 | Matsumoto, Akihiro (1733) | Lost 1-2 | -151511 |
| 6standard | 366 | Satou, Yuuya (1542) | Lost 0-2 | -171494 |
| 7standard | 448 | Tanehashi, Shigeharu (1504) | Won 2-1 | +181512 |
| 8standard | 224 | Yao, Shunsuke (1655) | Lost 1-2 | -151497 |
| 9standard | 495 | Furukawa, Takuto (1481) | Lost 0-2 | -191478 |
| top | average opponent: 1600record: 3-4 | new rating: 1478 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 986 | Muronoi, Shin (1469) | Won 2-1 | +181482 |
| 2standard | 100 | Cole, Damien (1518) | Won 2-0 | +191501 |
| 3standard | 539 | Itou, Makoto (1416) | Won 2-0 | +161517 |
| 4standard | 3 | Kudo, Amiru (1483) | Won 2-1 | +181535 |
| 5standard | 64 | Nakao, Motohiko (1586) | Lost 1-2 | -181517 |
| 6standard | 262 | Inoue, Daisuke (1492) | Lost 0-2 | -181499 |
| 7standard | 339 | Ito, Shungo (1541) | Won 2-0 | +191518 |
| 8standard | 323 | Nishizawa, Yasuhide (1659) | Lost 1-2 | -161502 |
| 9standard | 472 | Umman, Masahiro (1508) | Lost 0-2 | -181484 |
| top | average opponent: 1519record: 5-4 | new rating: 1484 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 648 | Moore, David [USA] (1484) | Lost 1-2 | -181482 |
| 2standard | 585 | Saito, Tomoyuki (1443) | Lost 1-2 | -191463 |
| 3standard | 1230 | Muramatsu, Kunihiro (1464) | Won 2-1 | +181481 |
| 4standard | 1062 | Gibralta, Thierry (1482) | Won 2-0 | +181499 |
| 5standard | 619 | Yamaguchi, Yuuichi (1536) | Lost 1-2 | -171482 |
| 6standard | 877 | Niwa, Ryuuta (1492) | Lost 1-2 | -181464 |
| top | average opponent: 1484record: 2-4 | new rating: 1464 | ||