The Isshi Incident was a coup which occurred during Asuka period when Emperor Tenchi and FUJIWARA no Kamatari assassinated SOGA no Iruka inside the Imperial Court, which led to the fall of the Soga clan (head family of the Soga clan).
乙巳の変（いっしのへん・おっしのへん）は天智天皇、藤原鎌足らが宮中で蘇我入鹿を暗殺して蘇我氏（蘇我本宗家）を滅ぼした飛鳥時代の政変。