Shigetoki was the son of Motoyama Yasuaki and, after assuming control of the family, established himself at Asakura castle. An erstwhile ally of the Chosokabe, he came to blows against that family in 1556. He held his own against Chosokabe Kunichika but was defeated by Chosokabe Motochika near Asakura Castle in 1562. Shigetoki, who was married to Kunichika's eldest daughter, afterwards submitted.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005