He made his younger sister, Tomiyahime, also known as Mikashigiyahime, the wife of Nigihayahi no Mikoto, who rode a Amano iwafune(boat) and descended down on a mountain in Ikaruga called Mt. Shiraniwa, and Nagasunehiko began to serve him.
登美夜毘売（トミヤヒメ）、あるいは三炊屋媛（ミカシギヤヒメ）ともいう自らの妹を、天の磐舟で、斑鳩の峰白庭山に降臨した饒速日命（ニギハヤヒノミコト）の妻とし、仕えるようになる。