Kokawa, Tsunao
Current rating: 1357
Record: 20-33
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1387 | |||
| round | table | opponent (rating) | result | Δrating |
| 2pioneer | 196 | Takada, Hiroki (1646) | Lost 1-2 | -131374 |
| 3pioneer | 445 | Murayama, Masanao (1497) | Lost 0-2 | -161358 |
| 4pioneer | 761 | Tsuda, Seiya (1443) | Won 2-0 | +191377 |
| 5pioneer | 655 | Osuga, Hiroaki (1228) | Lost 1-2 | -201357 |
| top | average opponent: 1454record: 1-3 | new rating: 1357 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1390 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 330 | Tatsuki, Makoto (1502) | Won 2-1 | +201410 |
| 3standard | 73 | Inui, Takashi (1521) | Lost 0-2 | -161394 |
| 4standard | 359 | Muraoka, Hideaki (1452) | Lost 0-2 | -171377 |
| 5standard | 685 | Sawahata, Atsushi (1627) | Won 2-0 | +221399 |
| 6standard | 410 | Nakano, Tatsuhito (1713) | Lost 0-2 | -121387 |
| top | average opponent: 1563record: 2-3 | new rating: 1387 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1399 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 378 | Suzuki, Kazushige (1751) | Won 2-1 | +251424 |
| 3standard | 169 | Itakura, Kenichi (1443) | Lost 0-2 | -181406 |
| 4standard | 605 | Teramoto, Tsubasa (1508) | Lost 1-2 | -161390 |
| top | average opponent: 1568record: 1-2 | new rating: 1390 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1405 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 727 | Ohkura, Ryota (1587) | Lost 0-2 | -151390 |
| 2sealed | 676 | Miwa, Ryou (1816) | Lost 1-2 | -101380 |
| 3sealed | 1186 | Tanaka, Kouki (1487) | Won 2-1 | +191399 |
| top | average opponent: 1630record: 1-2 | new rating: 1399 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1347 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 143 | Matsuda, Kenji (1494) | Won 2-1 | +201367 |
| 3standard | 269 | Ng, Jack Yu Kiu (1572) | Lost 0-2 | -141353 |
| 4standard | 807 | Wachigai, Hirotaka (1482) | Won 2-1 | +201373 |
| 5standard | 645 | Ito, Hiroto (1534) | Won 2-1 | +211394 |
| 6standard | 288 | Oshima, Yuki (1655) | Won 2-1 | +231417 |
| 7standard | 184 | Yamamoto, Takahiro (1601) | Won 2-0 | +211438 |
| 8standard | 138 | Saida, Toshihiro (1627) | Lost 0-2 | -141424 |
| 9standard | 143 | Takayama, Kan (1641) | Lost 1-2 | -141410 |
| 10standard | 395 | Fujita, Osamu (1779) | Lost 0-2 | -121398 |
| 11standard | 400 | Hayasi, Ryuji (1541) | Won 2-1 | +211419 |
| 12standard | 313 | Lyu, Yande (1655) | Lost 1-2 | -141405 |
| top | average opponent: 1598record: 6-5 | new rating: 1405 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1395 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 555 | Nagato, Yusuke (1458) | Lost 0-2 | -171378 |
| 3sealed | 679 | Hayashi, Naoyuki (1501) | Lost 0-2 | -161362 |
| 4sealed | 1100 | Yokoi, Hiroki (1502) | Lost 1-2 | -151347 |
| top | average opponent: 1487record: 0-3 | new rating: 1347 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 2138 | Kobayashi, Satoshi (1542) | Lost 0-2 | -161447 |
| 3sealed | 2358 | Yasuda, Tooru (1500) | Lost 0-2 | -171430 |
| 4sealed | 2355 | Okada, Noritada (1481) | Won 2-0 | +181448 |
| 5sealed | 2337 | Masunaga, Suzuno (1463) | Lost 0-2 | -171431 |
| 6sealed | 2310 | Kanekiyo, Ryusuke (1401) | Lost 1-2 | -191412 |
| 7sealed | 2252 | Nakamichi, Ichiro (1448) | Lost 1-2 | -171395 |
| top | average opponent: 1472record: 1-5 | new rating: 1395 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 682 | Kojo, Kaoru (1524) | Lost 0-2 | -181500 |
| 3sealed | 743 | Yamada, Masato (Shiga) (1501) | Lost 0-2 | -181482 |
| 4sealed | 815 | Matsuda, Yukihisa (1451) | Lost 0-2 | -191463 |
| top | average opponent: 1492record: 0-3 | new rating: 1463 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 768 | Nakada, Kokoro (1500) | Won 2-1 | +191502 |
| 2standard | 509 | Hayashi, Masahito (1472) | Won 2-0 | +171519 |
| 3standard | 554 | Shimono, Tetsuro (1555) | Lost 1-2 | -171502 |
| 4standard | 758 | Nakanishi, Yutaka (1480) | Won 2-1 | +171519 |
| 5standard | 657 | Takata, Mutsumu (1416) | Lost 0-2 | -201499 |
| 6standard | 641 | Ooshima, Shingo (1518) | Lost 1-2 | -171482 |
| 7standard | 742 | Fujii, Yuusaku (1445) | Won 2-0 | +171499 |
| 8standard | 697 | Sato, Hisao (1519) | Won 2-0 | +191518 |
| top | average opponent: 1488record: 5-3 | new rating: 1518 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 752 | Kotabe, Satoshi (1500) | Won 2-1 | +181518 |
| 2sealed | 864 | Hoshi, Koutarou (1515) | Lost 0-2 | -181500 |
| 3sealed | 1044 | Idesawa, Ryo (1505) | Lost 0-2 | -181482 |
| 4sealed | 1051 | Tsutai, Koutarou (1483) | Lost 1-2 | -181464 |
| 5sealed | 1058 | Matsuoka, Sho (1463) | Lost 1-2 | -181446 |
| 6sealed | 1012 | Tanaka, Hiroki (1540) | Won 2-1 | +201466 |
| 7sealed | 941 | Katou, Yoshitaka (1443) | Won 2-0 | +171483 |
| top | average opponent: 1493record: 3-4 | new rating: 1483 | ||