858 in Japan

Events in the year 858 in Japan.

Events

 * October 7 – Emperor Montoku dies after an 8-year reign. He is succeeded by his 8-year-old son Seiwa as the 56th emperor of Japan, with Fujiwara no Yoshifusa (Seiwa's grandfather) governing as regent and great minister of the Council of State.

Incumbents

 * Monarch: Montoku then Seiwa

Deaths

 * October 7 - Emperor Montoku (born 826)