Emperor Ninken (仁賢天皇, Ninken Tennō, or more likely Ninken Ōkimi), from his personal name Ōke or Oyoke, was the twenty-fourth emperor of Japan according to the traditional order of succession.
His reign is placed from 493 to 501, although the dates are not known with certainty. However, tradition attributes to him dates of life from 448 to 498 and places his reign from 488.
Originally, he and his brother Woke were found when the emperor Seinei died without heirs.
The two boys are grandsons of Emperor Richū and are promoted to a kind of adopted heirs of Seinei, although it is unclear whether or not this happens during Seinei's lifetime.
Despite being the youngest, Woke is crowned and becomes Emperor Kenzō following an agreement between the two brothers and after a one-year regency period by Iitoyo Ao no Kōjo.
However, he died shortly thereafter without heirs, so his brother succeeded him to the throne.