Emperor Richū , also known as Ōenoizahowake no Mikoto (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 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.

Emperor Nintoku , also known as Ohosazaki no Sumeramikoto (大鷦鷯天皇) was the 16th Emperor of Japan, according to the traditional order of succession. Due to his reputation for goodness derived from depictions in the Kojiki and Nihon Shoki, he is sometimes referred to as the Saint Emperor .