Due to Sakihisa's behavior after the Eiroku Incident, and also because Haruyoshi NIJO, who aspired to the position of Kanpaku, blamed Sakihisa, Yoshiaki suspected him of involvement in his older brother's death.
義昭は永禄の変後の前久の行動から兄の死には前久が関与しているのではと疑い、更に関白を狙う二条晴良も前久を追及した。