Emperor Yōmei (用明天皇, Yōmei-tennō, died 587) was the 31st emperor of Japan, according to the traditional order of succession.

The years of the reign of Yōmei start in 585 and end in 587. The names and sequence of the early emperors were not confirmed as "traditional" until the reign of Emperor Kammu, who was the 50th monarch of the Yamato dynasty.