Katou, Kotarou
Current rating: 1458
Record: 13-15
| Grand Prix Chiba 2016 (legacy) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 423 | Netsu, Tomoyuki (1484) | Lost 0-2 | -181458 |
| top | record: 0-1 | new rating: 1458 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 131 | Hikasa, Hiroshi (1500) | Lost 0-2 | -181516 |
| 2legacy | 347 | Ishino, Katsunori (1463) | Won 2-1 | +171533 |
| 3legacy | 390 | Nakagawa, Tango (1503) | Lost 0-2 | -191514 |
| 4legacy | 368 | Inoue, Daiki (1485) | Lost 0-2 | -181496 |
| 5legacy | 382 | Kawakami, Naoya (1392) | Lost 0-2 | -201476 |
| 6legacy | 361 | Inoue, Daisuke (1466) | Lost 1-2 | -181458 |
| 7legacy | 312 | Kurikawa, Hideyuki (1382) | Won 2-0 | +161474 |
| 8legacy | 253 | Kashima, Akihiro (1652) | Won 2-0 | +211495 |
| 9legacy | 209 | Ishikawa, Souta (1432) | Lost 0-2 | -191476 |
| top | average opponent: 1475record: 3-6 | new rating: 1476 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 619 | Yokota, Masaaki (1402) | Lost 0-2 | -211516 |
| 2sealed | 755 | Jitsukawa, Naofumi (1541) | Won 2-1 | +191535 |
| 3sealed | 764 | Nagami, Youichi (1586) | Lost 1-2 | -171518 |
| 4sealed | 788 | Tanahashi, Hirofumi (1444) | Won 2-0 | +161534 |
| top | average opponent: 1493record: 2-2 | new rating: 1534 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 231 | Takahashi, Daichi (1500) | Lost 0-2 | -191498 |
| 2standard | 317 | Koshiba, Norihiko (1536) | Won 2-0 | +191517 |
| 3standard | 337 | Ichikawa, Hiroshi (1430) | Won 2-0 | +161533 |
| 4standard | 173 | Toriuchi, Daizo (1535) | Won 2-1 | +181551 |
| 5standard | 110 | Fujita, Kenichi (1756) | Lost 0-2 | -141537 |
| 6standard | 167 | Akita, Naoto (1616) | Won 2-1 | +201557 |
| 7standard | 184 | Kanemaru, Daiki (1450) | Lost 0-2 | -201537 |
| top | average opponent: 1546record: 4-3 | new rating: 1537 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 41 | Hada, Kazumasa (1500) | Lost 1-2 | -181482 |
| 2modern | 535 | Chihara, Ryota (1482) | Lost 0-2 | -181464 |
| 3modern | 636 | Sunakawa, Keiji (1463) | Won 2-0 | +181482 |
| 4modern | 560 | Kurata, Shintaro (1483) | Won 2-1 | +181500 |
| 5modern | 380 | Nagamori, Shuuya (1504) | Won 2-0 | +181518 |
| 6modern | 350 | Kamakura, Jun (1516) | Won 2-0 | +181536 |
| 7modern | 191 | Miyazono, Takeshi (1457) | Lost 0-2 | -191517 |
| top | average opponent: 1486record: 4-3 | new rating: 1517 | ||