Kajihara, Koji
Current rating: 1605
Record: 41-34-7
| Grand Prix Taipei 2019 (WAR standard) | starting rating: 1566 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 205 | Wang, Xiao (1637) | Won 2-1 | +191585 |
| 2standard | 167 | Tomikawa, Akihisa (1624) | Lost 1-2 | -171568 |
| 3standard | 435 | Poon, Edwin (1435) | Won 2-1 | +151583 |
| 4standard | 318 | Sawetsritawan, Thanakarn (1655) | Won 2-0 | +201603 |
| 5standard | 75 | Ikeda, Takahiro (1764) | Lost 1-2 | -151588 |
| 6standard | 181 | Kuo, Kang Wei (1517) | Draw 1-1 | -21586 |
| 7standard | 247 | Ng, Kenji (1717) | Draw 1-1 | +31589 |
| 8standard | 266 | Chou, Liangcheng (1505) | Won 2-1 | +161605 |
| top | average opponent: 1607record: 4-2-2 | new rating: 1605 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1589 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 499 | Iriki, Takumi (1501) | Lost 0-2 | -191570 |
| 2modern | 907 | Nomura, Yosuke (1452) | Won 2-0 | +151585 |
| 3modern | 566 | Ohta, Masataka (1540) | Lost 1-2 | -181567 |
| 4modern | 855 | Miyano, Yosuke (1505) | Won 2-1 | +171584 |
| 5modern | 565 | Torii, Motonori (1594) | Lost 1-2 | -181566 |
| top | average opponent: 1519record: 2-3 | new rating: 1566 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 180 | Takahashi, Yoshimori (1535) | Won 2-1 | +181579 |
| 3modern | 174 | Hayashi, Takatomo (1733) | Lost 1-2 | -151564 |
| 4modern | 433 | Uehara, Jin (1424) | Lost 1-2 | -211543 |
| 5modern | 1001 | Yu, Libang (1520) | Won 2-0 | +181561 |
| 6modern | 579 | Matsumoto, Shou (1512) | Lost 1-2 | -191542 |
| 7modern | 843 | Stickar, Andres (1503) | Won 2-1 | +171559 |
| 8modern | 547 | Ueda, Yushi (1409) | Won 2-0 | +151574 |
| 9modern | 394 | Yamamoto, Shohei (1721) | Won 2-1 | +211595 |
| 10modern | 376 | Onishi, Ryosuke (1489) | Won 2-1 | +161611 |
| 11modern | 273 | Shiba, Yoshimasa (1593) | Lost 0-2 | -181593 |
| 12modern | 254 | Akita, Naoto (1586) | Won 2-0 | +181611 |
| 13modern | 170 | Higashida, Taketo (1481) | Lost 1-2 | -211590 |
| 14modern | 244 | Ida, Eigo (1552) | Won 2-1 | +181608 |
| 15modern | 197 | Yoshida, Shintaro (1588) | Lost 0-2 | -191589 |
| top | average opponent: 1546record: 8-6 | new rating: 1589 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 268 | Takayama, Kiichiro (1495) | Won 2-0 | +171567 |
| 2legacy | 275 | Kaneko, Masayuki3656 (1500) | Lost 0-2 | -191548 |
| 3legacy | 728 | Kanemaru, Tomoki (1499) | Won 2-0 | +171565 |
| 4legacy | 631 | Kobayashi, Ryosuke (1586) | Won 2-1 | +181583 |
| 5legacy | 535 | Tamada, Ryoichi (1851) | Lost 1-2 | -131570 |
| 6legacy | 468 | Uemura, Akihiro (1620) | Won 2-1 | +191589 |
| 7legacy | 506 | Sakai, Arata (1475) | Won 2-1 | +161605 |
| 8legacy | 336 | Takemura, Yoshiyuki (1539) | Lost 0-2 | -191586 |
| 9legacy | 479 | Ito, Takuya (1505) | Won 1-0 | +161602 |
| 10legacy | 209 | Gimmillaro, Stefan (1557) | Lost 0-2 | -191583 |
| 11legacy | 349 | Nishikawa, Seigo (1509) | Draw 1-1 | -11582 |
| 12legacy | 304 | Kawakami, Takehito (1624) | Won 2-1 | +191601 |
| 13legacy | 234 | Zhang, Xuan (1478) | Lost 1-2 | -201581 |
| 14legacy | 253 | Heshiki, Tomohiro (1552) | Draw 1-1 | -11580 |
| 15legacy | 258 | Katou, Yuuta (1533) | Lost 0-2 | -191561 |
| top | average opponent: 1555record: 7-6-2 | new rating: 1561 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1579 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 631 | Yoshimoto, Reo (1500) | Lost 0-2 | -191560 |
| 2standard | 1188 | Tokuda, Kiyoto (1482) | Lost 1-2 | -201540 |
| 3standard | 1523 | Yokobayashi, Hirokazu (1431) | Won 2-0 | +161556 |
| 4standard | 1229 | Kobayashi, Kenta (1478) | Won 2-0 | +171573 |
| 5standard | 1181 | Itoh, Yoshio (1441) | Lost 1-2 | -201553 |
| 6standard | 1190 | Takahashi, Akira (Setagaya) (1485) | Lost 1-2 | -201533 |
| 7standard | 1208 | Atobe, Kazuki (1475) | Lost 1-2 | -191514 |
| 8standard | 1039 | Takeda, Teruhisa (1555) | Won 2-1 | +191533 |
| 9standard | 850 | Ito, Sho (1480) | Won 2-0 | +171550 |
| top | average opponent: 1481record: 4-5 | new rating: 1550 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1042 | Sato, Kenji0666 (1517) | Lost 1-2 | -191542 |
| 3sealed | 1236 | Masuda, Kouhei (1429) | Won 2-0 | +161558 |
| 4sealed | 1137 | Matsubara, Tohru (1586) | Won 2-1 | +191577 |
| 5sealed | 887 | Kitahara, Hiroaki (1859) | Won 2-1 | +231600 |
| 6sealed | 846 | Ueno, Tomoya (1637) | Lost 0-2 | -181582 |
| 7sealed | 921 | Kato, Yusuke (1480) | Won 2-1 | +171599 |
| 8sealed | 873 | Yanou, Tomiyuki (1533) | Lost 0-2 | -201579 |
| top | average opponent: 1577record: 4-3 | new rating: 1579 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 741 | Tei, Shinri (1537) | Won 2-0 | +181560 |
| 4modern | 795 | Niwa, Ryuuta (1520) | Lost 0-2 | -181542 |
| 5modern | 863 | Hada, Nobuto (1543) | Won 2-0 | +181560 |
| 6modern | 761 | Matsuda, Yuuichirou (1548) | Draw 1-1 | -11559 |
| 7modern | 783 | Endou, Taiki (1563) | Won 2-1 | +181577 |
| 8modern | 753 | Itou, Hayato7608 (1575) | Draw 1-1 | 01577 |
| 9modern | 800 | Hasegawa, Suguru (1667) | Lost 0-2 | -161561 |
| top | average opponent: 1565record: 3-2-2 | new rating: 1561 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 601 | Yabuta, Junichi (1668) | Won 2-1 | +211516 |
| 3sealed | 581 | Adachi, Kazutoshi (1520) | Won 2-0 | +181534 |
| 4sealed | 565 | Endo, Jun'Ichi (1768) | Lost 1-2 | -141520 |
| 5sealed | 653 | Oomae, Kiyotaka (1536) | Won 2-1 | +191539 |
| 6sealed | 592 | Yohara, Tosho (1560) | Won 2-1 | +181557 |
| 7sealed | 552 | Matsubara, Takeyuki (1648) | Lost 1-2 | -161541 |
| 8sealed | 593 | Tsuruoka, Shouta (1642) | Lost 1-2 | -171524 |
| 9sealed | 595 | Nose, Shunsuke (1523) | Won 2-1 | +181542 |
| top | average opponent: 1608record: 5-3 | new rating: 1542 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 260 | Okamoto, Masami (1500) | Lost 1-2 | -181482 |
| 2standard | 304 | Okishige, Kazumi (1428) | Draw 1-1 | -11481 |
| 3standard | 474 | Yamamura, Mitsutoshi (1318) | Won 2-0 | +151496 |
| 4standard | 404 | Aiba, Takashi (1419) | Lost 1-2 | -191477 |
| 5standard | 466 | Suzuki, Ei (1389) | Won 2-1 | +161493 |
| 6standard | 374 | Naito, Yuuki (1398) | Won 2-1 | +161509 |
| 7standard | 274 | Nishimura, Yuichi (1437) | Won 2-0 | +171526 |
| 8standard | 195 | Wakahara, Kazumi (1561) | Lost 0-2 | -171509 |
| 9standard | 213 | Takeuchi, Ryota (1745) | Lost 0-2 | -141495 |
| top | average opponent: 1466record: 4-4-1 | new rating: 1495 | ||