One theory states that Furuhito no Oe no Miko's statement "Karahito killed Kuratsukuri (Iruka)"('韓人殺鞍作臣') which he gave when he escaped after the assassination of SOGA no Iruka implies that Karahito indicates SOGANOKURA-YAMADA no Ishikawamaro since his ancestor had shared the name Karahito.
蘇我入鹿暗殺後、脱出した古人大兄皇子が述べた「韓人（からひと）、鞍作（入鹿）を殺しつ」（「韓人殺鞍作臣」）の韓人は、先祖にその名を持つ、蘇我倉山田石川麻呂を指すという説もある。