Osa, Tomoki
Current rating: 1607
Record: 24-16-1
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1640 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 70 | Yamamoto, Kento (1533) | Lost 0-2 | -201620 |
| 4standard | 421 | Chiba, Takato (1514) | Lost 1-2 | -201600 |
| 5standard | 641 | Hasaba, Kenji (1451) | Won 2-1 | +151615 |
| 6standard | 501 | Hirose, Daichi (1378) | Won 2-0 | +141629 |
| 7standard | 483 | Ueda, Tadahiko (1414) | Lost 0-2 | -221607 |
| top | average opponent: 1458record: 2-3 | new rating: 1607 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 405 | Oku, Daisaku (1435) | Won 2-0 | +151615 |
| 2sealed | 93 | Wada, Yusuke (1602) | Won 2-0 | +181633 |
| 3sealed | 98 | Lim, Ting Yong (1464) | Won 2-1 | +151648 |
| 4sealed | 45 | Kinoshita, Kentarou (1623) | Lost 0-2 | -181630 |
| 5sealed | 125 | Isaka, Tsuyoshi (1542) | Won 2-1 | +161646 |
| 6sealed | 138 | Inamura, Sachio (1549) | Won 2-0 | +161662 |
| 7sealed | 53 | Tanji, Kensuke (1553) | Lost 0-2 | -201642 |
| 8sealed | 73 | Gotou, Hiroyuki (1624) | Lost 0-2 | -181624 |
| 9sealed | 118 | Teo, Justin (1497) | Won 2-0 | +161640 |
| top | average opponent: 1543record: 6-3 | new rating: 1640 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 582 | Nakamoto, Tadahiko (1521) | Draw 1-1 | -11572 |
| 2legacy | 727 | Tamura, Masahiro (1481) | Won 2-1 | +161588 |
| 3legacy | 721 | Maeda, Kouzo (1519) | Won 2-1 | +171605 |
| 4legacy | 616 | Kushibe, Toshiki (1671) | Won 2-1 | +191624 |
| 5legacy | 555 | Koyama, Yuji (1632) | Lost 1-2 | -181606 |
| 6legacy | 629 | Yamanaka, Kousuke (1562) | Lost 0-2 | -181588 |
| 7legacy | 708 | Yoshimura, Wataru (1475) | Won 2-1 | +161604 |
| 8legacy | 641 | Kuan, Jung-Ho (1577) | Won 2-0 | +171621 |
| 9legacy | 595 | Kamiyama, Daiki (1467) | Lost 0-2 | -211600 |
| top | average opponent: 1545record: 5-3-1 | new rating: 1600 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 792 | Kuribayashi, Takayuki (1500) | Won 2-0 | +171538 |
| 2sealed | 630 | Iwaki, Tetsuya (1389) | Lost 0-2 | -201518 |
| 3sealed | 962 | Iwasa, Kouhei (1500) | Won 2-0 | +171535 |
| 4sealed | 861 | Shimizu, Haruki (1569) | Won 2-1 | +191554 |
| 5sealed | 729 | Kinugasa, Satoshi (1727) | Lost 0-2 | -151539 |
| 6sealed | 870 | Hayase, Fumihiko (1465) | Won 2-1 | +171556 |
| 7sealed | 751 | Ishizuka, Shoji (1583) | Won 2-0 | +181574 |
| 8sealed | 688 | Yamaguchi, Shouta (1526) | Won 2-0 | +171591 |
| 9sealed | 652 | Kanayama, Haruki (1571) | Lost 0-2 | -181573 |
| top | average opponent: 1537record: 6-3 | new rating: 1573 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 966 | Okawa, Jun (1500) | Won 2-0 | +181518 |
| 2modern | 736 | Akita, Takumi (1517) | Lost 0-2 | -181500 |
| 3modern | 974 | Katagiri, Kazushi (1549) | Won 2-0 | +191519 |
| 4modern | 910 | Fujihira, Kohei (1628) | Lost 0-2 | -161503 |
| 5modern | 1036 | Zhao, Tianyu (1672) | Lost 1-2 | -151488 |
| 6modern | 1038 | Arai, Yuma (1482) | Won 2-0 | +181506 |
| 7modern | 944 | Osugi, Shotaro (1505) | Won 2-0 | +181524 |
| 8modern | 926 | Tateno, Tomoaki (1373) | Lost 1-2 | -211503 |
| 9modern | 911 | Tanaka, Ryuuma (1481) | Won 2-1 | +181521 |
| top | average opponent: 1523record: 5-4 | new rating: 1521 | ||