After his lord, Masamoto HOSOKAWA was assassinated in 1507, he served Masamoto's adopted son, Takakuni HOSOKAWA as a vassal, and distinguished himself by killing his uncle Tadanaga YAKUSHIJI for murdering Masamoto.
永正4年（1507年）に主君の細川政元が暗殺されると、その養子である細川高国の家臣となり、政元を殺した叔父の薬師寺長忠討伐で功績を挙げた。