According to Kojiki, when Ninigi, the grandson of Amaterasu, was sent down to earth, Omoikane (the god of wisdom and talent), Ameno Tajikarao (the god of physical strength) and Amanoiwatowakenokami were added to his attendants along with three sacred imperial treasures given to him.
ニニギが天降る際、三種の神器にオモイカネ・アメノタヂカラオ・天石門別神を添えたと記されている。