What makes a tachi different from a katana in design?
Updated Mar 2026
The tachi predates the katana and features a deeper curvature along the blade, a longer overall length, and a mounting style designed for wear edge-down suspended from the belt rather than thrust through it. This edge-down orientation influenced every element of the koshirae - from the positioning of the menuki on the handle to the direction the saya lacquer is applied. On a properly assembled tachi, the suspension fittings called ashi attach to the saya so the piece hangs at the correct angle when displayed or worn. For collectors, this means a tachi's visual presentation is fundamentally different from a katana even at rest on a display stand - the curvature reads more dramatically and the full koshirae tends to appear more ceremonially elaborate.