Emperor Chūai (仲哀天皇) was the forteenth imperial ruler of Japan to appear on the traditional list of emperors. No firm date can be assigned to this emperor and he is regarded by historians as a "legendary emperor". This does not necessarily imply that no such person ever existed, just that there is insufficient material to assign him to a historical period.

His wife is Jingo of Japan.

Preceded by:
Seimu
List of Japanese Emperors Succeeded by:
Ojin