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Japan: Emperor Ōjin, also known as Homutawake or Hondawake, was the 15th emperor of Japan according to the traditional order of succession. He is notionally considered to have reigned 270-310 CE. From 'Shoko Jisshu', 1908

According to the ancient Japanese chronicles Kojiki written in 680 and Nihon Shoki written in 720, Ōjin was the son of the Emperor Chūai and his consort Jingū. As Chūai died before Ōjin's birth, his mother Jingū became the de facto ruler. These sources allege that Ōjin was conceived but unborn when Chūai died. His widow, Jingū, then spent three years in the conquest of Korea, then, after her return to Japan, the new emperor was born, three years after the death of the father.

Ojin became the crown prince at the age of four. He was crowned (in 270) at the age of 70 and reigned for 40 years until his death in 310. He supposedly lived in two palaces both of which are in present day Osaka. Ōjin is traditionally identified as the father of Emperor Nintoku, who acceded after Ōjin's death.

Ōjin has been deified as Hachiman Daimyōjin, regarded as the guardian of warriors. The Hata Clan considered him their guardian Kami. The actual site of Ōjin's grave is not known, but he is traditionally venerated at a memorial Shinto shrine (misasagi) at Osaka.

The Imperial Household Agency designates this location as Ōjin's mausoleum. It is formally named Eega no Mofushi no oka no misasagi.