Japan sent 41 athletes to the 14th IAAF World ChampionshipsinMoscow, Russia. The Japan team were announced by the Japan Association of Athletics Federations after the 2013 Japan Championships in Athletics.
| Japan at the 2013 World Championships in Athletics | |
|---|---|
 | |
| WA code | JPN |
| National federation | Japan Association of Athletics Federations |
| Website | www |
| inMoscow | |
| Competitors | 44 (men: 32; women: 12) |
| Medals |
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| World Championships in Athletics appearances | |
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← 2011 2015 → | |
| Medal | Name | Event | Date |
|---|---|---|---|
 Bronze |
Kayoko Fukushi | Marathon | 11 August |
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| Athlete | Event | Preliminaries | Heats | Semifinals | Final | ||||
|---|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | Time | Rank | ||
| Chisato Fukushima | 200 metres | 23.85 | 37 | Did not advance | |||||
| Misaki Onishi | 5000 metres | 16:16.52 | 19 | Did not advance | |||||
| Hitomi Niiya | 10,000 metres | 30:56.70 | 5 | ||||||
| Hitomi Shimura | 13.72 | 34 | Did not advance | ||||||
| Satomi Kubokura | 400 | 56.33 | 16:16.52 | Did not advance | |||||
| Kayoko Fukushi | 2:27:45 |
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| Ryoko Kizaki | 2:31:28 | 4th | |||||||
| Mizuki Noguchi | DNF | ||||||||
| Kumi Otoshi | 20 kilometres walk | 1:32:44 | 26th | ||||||
| Masumi Fuchise | 20 kilometres walk | 1:33:13 | 28th | ||||||
| Athlete | Event | Qualification | Final | ||
|---|---|---|---|---|---|
| Distance | Position | Distance | Position | ||
| Yuki Ebihara | Javelin | 59.80 | 16 | did not advance | |
| Miyuki Fukumoto | High Jump | 1.78 | 27 | did not advance | |
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