Japan in Athletics |
  
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Athlete |
Event |
Heat |
Res. |
Pos. |
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| Takatoshi Abe | 400 m hurdles M | Semifinal | 48,97 | 3 | |||
| Round 1 | 49,25 | 2 | Q | ||||
| Seika Aoyama | 4x400 m Mixed M | Round 1 | 3.18,77 | 8 | |||
| Ryohei Arai | Javelin throw M | Qualifying Round | 81,71 | 8 | |||
| Masaki Ejima | Pole vault M | Qualifying Round | 5,45 | 14 | |||
| Takashi Eto | High jump M | Qualifying Round | 2,17 | 12 | |||
| Masumi Fuchise | 50 km walk W | Final | 4.41.02 | 11 | |||
| Nanako Fujii | 20 km walk W | Final | 1.34.50 | 7 | |||
| Kohei Futaoka | Marathon M | Final | 2.19.23 | 37 | |||
| Yuki Hashioka | Long jump M | Final | 7,97 | 8 | |||
| Qualifying Round | 8,07 | 2 | q | ||||
| Koki Ikeda | 20 km walk M | Final | 1.29.02 | 6 | |||
| Shunsukei Izumiya | 110 m hurdles M | Round 1 | dns | - | |||
| Taio Kanai | 110 m hurdles M | Round 1 | 13,74 | 7 | |||
| Hayato Katsuki | 50 km walk M | Final | 4.46.10 | 27 | |||
| Yuki Kawauchi | Marathon M | Final | 2.17.59 | 29 | |||
| Ayanoi Kemitsu | Marathon W | Final | dnf | - | |||
| Ayako Kimura | 100 m hurdles W | Round 1 | 13,19 | 5 | |||
| Tomoka Kimura | 5000 m W | Round 1 | 15.53,08 | 13 | |||
| Yoshihide Kiryu | 100 m M | Semifinal | 10,16 | 6 | |||
| Round 1 | 10,18 | 4 | q | ||||
| 4x100 m M | Final | 37,43 |  |
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| 4x100 m M | Round 1 | 37,78 | 2 | Q | |||
| Haruka Kitaguchi | Javelin throw W | Qualifying Round | 60,84 | 7 | |||
| Yuki Koike | 100 m M | Semifinal | 10,28 | 7 | |||
| Round 1 | 10,21 | 4 | q | ||||
| 200 m M | Round 1 | 20,46 | 4 | ||||
| 4x100 m M | Round 1 | 37,78 | 2 | Q | |||
| Nanaka Kori | Discus throw W | Qualifying Round | 48,82 | 15 | |||
| Madoka Nakano | Marathon W | Final | 2.42.39 | 11 | |||
| Hitomi Niiya | 10000 m W | Final | 31.12,99 | 11 | |||
| Tomohiro Noda | 50 km walk M | Final | dnf | - | |||
| Kumiko Okada | 20 km walk W | Final | 1.34.36 | 6 | |||
| Abdul Hakim Sani Brown | 100 m M | Semifinal | 10,15 | 5 | |||
| Round 1 | 10,09 | 3 | Q | ||||
| 4x100 m M | Round 1 | 37,78 | 2 | Q | |||
| 4x100 m M | Final | 37,43 | |
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| Kentaro Sato | 4x400 m M | Round 1 | 3.02,05 | 5 | |||
| Ryo Sato | High jump M | Qualifying Round | 2,22 | 12 | |||
| Yuka Sato | Javelin throw W | Qualifying Round | 55,03 | 15 | |||
| Daichi Sawano | Pole vault M | Qualifying Round | 5,45 | 13 | |||
| Kirara Shiraishi | 200 m M | Round 1 | 20,62 | 5 | |||
| 4x100 m M | Round 1 | 37,78 | 2 | Q | |||
| 4x100 m M | Final | 37,43 | |
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| Shoutarou Shiroyama | Long jump M | Final | 7,77 | 11 | |||
| Qualifying Round | 7,94 | 4 | q | ||||
| Yusuke Suzuki | 50 km walk M | Final | 4.04.20 |  |
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| Shuhei Tada | 4x100 m M | Final | 37,43 | |
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| Eiki Takahashi | 20 km walk M | Final | 1.30.04 | 10 | |||
| Saki Takashima | 4x400 m Mixed M | Round 1 | 3.18,77 | 8 | |||
| Shunya Takayama | 110 m hurdles M | Semifinal | 13,58 | 6 | |||
| Round 1 | 13,32 | 2 | Q | ||||
| Tomoya Tamura | 4x400 m Mixed M | Round 1 | 3.18,77 | 8 | |||
| Nozomi Tanaka | 5000 m W | Final | 15.00,01 | 14 | |||
| Round 1 | 15.04,66 | 6 | q | ||||
| Mizuki Tanimoto | Marathon W | Final | 2.39.09 | 7 | |||
| Asuka Terada | 100 m hurdles W | Round 1 | 13,20 | 5 | |||
| Naoto Tobe | High jump M | Qualifying Round | 2,26 | 7 | |||
| Masaki Toyoda | 400 m hurdles M | Semifinal | 50,30 | 8 | |||
| Round 1 | 50,34 | 5 | q | ||||
| Hibiki Tsuha | Long jump M | Qualifying Round | 7,72 | 10 | |||
| Keisuke Ushiro | Decathlon M | Final standing | 7545 | 16 | |||
| Kota Wakabayashi | 4x400 m M | Round 1 | 3.02,05 | 5 | |||
| 4x400 m Mixed M | Round 1 | 3.18,77 | 8 | ||||
| Julian Jrummi Walsh | 400 m M | Semifinal | 45,13 | 4 | |||
| Round 1 | 45,14 | 2 | Q | ||||
| 4x400 m M | Round 1 | 3.02,05 | 5 | ||||
| Hiroki Yamagishi | Marathon M | Final | 2.16.43 | 25 | |||
| Seito Yamamoto | Pole vault M | Qualifying Round | 5,60 | 12 | |||
| Toshikazu Yamanishi | 20 km walk M | Final | 1.26.34 | |
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| Minami Yamanouchi | 10000 m W | Final | 32.53,46 | 19 | |||
| Jun Yamashita | 200 m M | Round 1 | 20,62 | 5 | |||
| Reimi Yoshimura | 3000 m steeplechase W | Round 1 | 9.55,72 | 13 | |||
| Shotaii Zuka | 4x400 m M | Round 1 | 3.02,05 | 5 | |||
