A rare and historically significant Japanese metsubushi (eye-blinding device), crafted in the late Edo period. The piece bears the signature of Sano Tsunetada, the noted gunsmith of the Shinshu Ueda region, who invented and documented this form in his treatise “Sokutouki Biography.” Used by retainers of the Matsushiro clan, this device was designed for self-defense and capture, dispersing fine sand or chili powder to disorient opponents.

Constructed in high-polish black lacquered wood, with intricate brass mouthpiece and collar, the metsubushi retains its original deep patina and cord. Its compact form allows for multiple uses, as described by Tsunetada in period manuals.

Accompanied by NKBKH certification (named Sajinra), attesting to its authenticity and historical pedigree.