, also known as 大兄去来穂別尊 was the 17th Emperor of Japan, according to the traditional order of succession. Both the Kojiki, and the Nihon Shoki (collectively known as the Kiki) recorded events that took place during Richū's alleged lifetime. This emperor is best known for an assassination attempt on his life by his brother Suminoe after the death of their father Emperor Nintoku. Although no firm dates can be assigned to his life, Richū's brief reign is conventionally considered to have been from 400 to 405.
During his reign local recorders were allegedly appointed for the first time in various provinces, a royal treasury was established, and court waitresses (Uneme) first appeared. Richū had both a wife and a concubine during his lifetime which bore him 4 children (2 boys and 2 girls). None of his children would inherit the throne as Richū appointed the title of crown prince to his other brother Mizuhawake. Richū allegedly died sometime in 405 at the age of 70, and his brother Mizuhawak