He traveled to Tanegashima Island and bought a Tanegashima rifle from the feudal lord Tokitaka TANEGASHIMA, and made Seiemon SHIBATSUJI, a craftsman, to reproduce the rifle (teppo).
自ら種子島に渡り、領主・種子島時堯から一丁の種子島銃を買い、職人・芝辻清右衛門に鉄砲を複製させた。