| Japan at the 2013 World Championships in Athletics | |
|---|---|
 | |
| WA code | JPN |
| National federation | Japan Association of Athletics Federations |
| Website | www |
| in Moscow | |
| Competitors | 44 (men: 32; women: 12) |
| Medals |
|
| World Championships in Athletics appearances | |
Japan sent 41 athletes to the 14th IAAF World Championships in Moscow, Russia. The Japan team were announced by the Japan Association of Athletics Federations after the 2013 Japan Championships in Athletics.