In 649, when Ishikawamaro was about to cause the rebellion, he was betrayed by his half brother SOGA no Himuka, and since troops were sent by Emperor Kotoku, he committed suicide in Yamada-dera Temple with his eldest son SOGA no Kogoshi, his wife and his children.
大化5年（649年）、異母弟の蘇我日向に石川麻呂が謀反を起こそうとしていると密告されて孝徳天皇により兵が派遣されたため、長男の蘇我興志ら妻子と共に山田寺で自害した。