Prince Ōtsu
| Prince Ōtsu | |
|---|---|
| Born | 663 Tsukushi Province, Japan |
| Died | October 25, 686 (aged 22–23) Asuka, Japan |
| Spouse | Princess Yamanobe |
| Issue | Prince Awazuou (粟津王) |
| Father | Emperor Tenmu |
| Mother | Ōta |
Prince Ōtsu (大津皇子, Ōtsu-Ōji; 663–686) was a Japanese poet and the son of Emperor Tenmu.
Viewed as the emperor's likely heir, Imperial Prince Ōtsu began attending to matters of state in 683, but was demoted in 685 when the court rank system was revised. Soon after Emperor Tenmu's death, Ōtsu was accused of conspiracy and was swiftly executed in 686. The last days of his life are described in the Nihon Shoki and Man'yōshū; his personality emerges through poetry anthologies including the Kaifūsō.