Japan at the 2011 World Championships in Athletics
Japan competed at the 2011 World Championships in Athletics from August 27 to September 4 in Daegu, South Korea.
Team selection
The country will send a 50-member squad to compete at the event. The final team composition was announced following the conclusion of the Asian Championships in Kobe, Japan, the final qualifying meeting as designated by the Japan Association of Athletics Federations.The final team on the entry list comprises the names of 52 athletes, including 2 athletes invited by the IPC for exhibition
events: Jun Hiromichi, 400m T53 men, and Wakako Tsuchida, 800m T54 women.
The following athletes appeared on the preliminary Entry List, but not on the Official Start List of the specific event, resulting in a total number of 48 competitors:
| KEY: | Did not participate | Competed in another event |
Medalists
The following competitor from Japan won a medal at the Championshipsvictory celebration at Daegu
| Medal | Athlete | Event |
| Koji Murofushi | Hammer throw |