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He was assassinated at court in a coup d'état involving Nakatomi no Kamatari and Prince Naka-no-Ōe (see: Isshi Incident), who accused him of trying to murder Prince Yamashiro, a charge which Soga no Iruka denied. Soga no Emishi also committed suicide soon after his son's death, and the main branch of the Soga clan became extinct. Prince Naka-no-Oe later ascended the throne as Emperor Tenji, and Nakatomi no Kamatari was promoted and given the name Fujiwara no Kamatari.
- "Soga no Iruka house believed found," Japan Times Weekly, 14 November 2005; retrieved 2013-2-29.