In the beginning of the Nara period, he gained political power as a leader of the Imperial family together with Prince Nagaya.

Toneri's mother was Princess Nītabe, who was a daughter of Emperor Tenji.

His consort was Taima-no-Yamashiro (or Tagima-no-Yamashiro) and he had many sons: Princes Mihara, Mishima, Fune (or Funa), Ikeda, Moribe, Miura and Ōi (later Emperor Junnin).

Although he was plagued, he survived and lived longest among the sons of Emperor Tenmu.

This biography of a member of the Imperial House of Japan is a stub.