Umako was the son of Soga Iname no Sukune, and therefore, he would have been one of Emperor Yōmei's cousins.

Rather, it was presumably Sumeramikoto or Amenoshita Shiroshimesu Ōkimi (治天下大王), meaning "the great king who rules all under heaven".

Although Emperor Yōmei is reported to have died from illness, this incident and the brevity of his reign have led some to speculate that he was actually assassinated by Moriya and Prince Anahobe.

[1] The Emperor is traditionally venerated at a memorial Shinto shrine (misasagi) at Osaka.

[5] Unless otherwise noted (as BC), years are in CE / AD  * Imperial Consort and Regent Empress Jingū is not traditionally listed.