Isa, Yukifumi
Current rating: 1421
Record: 15-20-3
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 208 | Mutaguchi, Kazuya (1500) | Won 2-1 | +191454 |
| 2standard | 284 | Nakamoto, Takahiro (1499) | Lost 0-2 | -171437 |
| 3standard | 583 | Mizuno, Soichiro (1450) | Won 2-0 | +181455 |
| 4standard | 459 | Kamimura, Fumihiro (1507) | Lost 0-2 | -171438 |
| 5standard | 450 | Kawai, Riku (1503) | Lost 0-2 | -171421 |
| top | average opponent: 1492record: 2-3 | new rating: 1421 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 76 | Kamikawa, Takahiro (1500) | Won 2-0 | +191485 |
| 2sealed | 54 | Yoshida, Keitaro (1499) | Lost 0-2 | -181467 |
| 3sealed | 659 | Tucci, Joel (1536) | Lost 1-2 | -171450 |
| 4sealed | 1109 | Abe, Yuuta (1512) | Lost 1-2 | -171433 |
| 5sealed | 1114 | Kamiharai, Toshihito (1455) | Won 2-1 | +191452 |
| 6sealed | 893 | Senshuu, Yoshinori (1501) | Lost 0-2 | -171435 |
| top | average opponent: 1500record: 2-4 | new rating: 1435 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 478 | Sano, Shigeaki (1386) | Draw 1-1 | -21464 |
| 2sealed | 321 | Shibuya, Yusuke (1498) | Draw 1-1 | +11465 |
| 3sealed | 507 | Mizukami, Takuya (1500) | Won 2-0 | +191484 |
| 4sealed | 372 | Homma, Akira (1501) | Won 2-0 | +181502 |
| 5sealed | 247 | Okuyama, Kouhei (1499) | Lost 1-2 | -181484 |
| 6sealed | 330 | Muramatsu, Yusuke (1501) | Lost 0-2 | -181466 |
| top | average opponent: 1481record: 2-2-2 | new rating: 1466 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 663 | Yamaguchi, Hiroshi (Fukui) (1505) | Lost 0-2 | -181486 |
| 2sealed | 790 | Sato, Tomoharu (1483) | Draw 1-1 | 01486 |
| 3sealed | 860 | Ishii, Masashi (1415) | Lost 0-2 | -201466 |
| 4sealed | 887 | Yoshida, Takashi (1432) | Won 2-0 | +181484 |
| 5sealed | 823 | Smithberger, John (1482) | Lost 1-2 | -181466 |
| top | average opponent: 1463record: 1-3-1 | new rating: 1466 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 493 | Uchiyama, Takenori (1389) | Lost 1-2 | -201467 |
| 2standard | 481 | Minakata, Satoshi (1482) | Lost 1-2 | -181449 |
| 3standard | 724 | Yamamoto, Kazuhide (1415) | Lost 1-2 | -181431 |
| 4standard | 780 | Okayama, Hironori (1448) | Won 2-1 | +181449 |
| 5standard | 680 | Tashiro, Atsunori (1462) | Won 2-1 | +181467 |
| 6standard | 536 | Tsukamoto, Tatsushi (1429) | Won 2-1 | +181485 |
| 7standard | 431 | Fujita, Toshitake (1526) | Won 2-1 | +181503 |
| 8standard | 120 | Tanida, Akimasa (1511) | Won 2-0 | +191522 |
| 9standard | 254 | Nishikawa, Suguru (1534) | Lost 0-2 | -181504 |
| top | average opponent: 1466record: 5-4 | new rating: 1504 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 290 | Watanabe, Takefumi (1500) | Won 2-1 | +181518 |
| 2modern | 113 | Sakamoto, Sakito (1680) | Lost 1-2 | -151503 |
| 3modern | 452 | Fujii, Takashi (1551) | Lost 0-2 | -171486 |
| 4modern | 608 | Haga, Ryuji (1482) | Won 2-1 | +181504 |
| 5modern | 533 | Narisawa, Harumasa (1498) | Lost 1-2 | -181486 |
| 6modern | 495 | Yoshiki S., (1483) | Won 2-0 | +181504 |
| 7modern | 344 | Watanabe, Kazuki (1577) | Lost 1-2 | -171487 |
| top | average opponent: 1539record: 3-4 | new rating: 1487 | ||