There remain some of "Namako Sukashi Tsuba" (Namako Sukashi Shell) by Musashi in Shimada Museum of Art and so on, and one of copper "Namako Sukashi Tsuba," which had been kept in the Terao family, is regarded as the one had been attached to Musashi's sword "Hoki Yasutsuna,"and designated as cultural property of Kumamoto Prefecture (at present, it is kept by a private person).
また、武蔵作とされる海鼠透鐔が島田美術館等にいくつか残されているが、武蔵の佩刀伯耆安綱に付けられていたとされる、寺尾家に伝来していた素銅製の「海鼠透鐔」（個人蔵）が熊本県文化財に指定されている。