Ichinobe-no Oshiwa

was the eldest son of Japanese Emperor Richū; and he was the father of sons who would become known as Emperor Kenzō and Emperor Ninken.
No firm dates can be assigned to the lives or reigns of this period, but the reign of Emperor Ankō is considered to have lasted from 456 to 479; and Oshiwa died during Ankō's reign.
Traditional history.
According to the "Nihonshoki", Oshiwa was killed in a hunting accident by Emperor Yūryaku. His sons were adopted as heirs by Emperor Seinei. They are known as Prince Woke (or Kenzō"-tennō") and as Prince Oke (or Ninken"-tennō").