He was known as a teppo smith as well as a craftsman who developed high-performance air guns equipped with a bottle filled with accumulated air pressure called 'kiho' and reflecting telescopes.
本業の鉄砲のほか、「気炮」と呼ばれる蓄気ボンベ式の高性能空気銃や反射望遠鏡の開発で知られる。