It has been said that Sukehide learned the art of fire weapons from a person called Yoshikuni SASAKI who was so excellent at the art of fire weapons as to be called Teppo-Meijin (Master in the art of fire weapons).
祐秀は鉄砲術に優れ、当時、鉄砲名人とまで呼ばれた佐々木義国という人物から鉄砲術を学んだという。