What makes tachi swords different from katana in design?
Updated Mar 2026
The tachi predates the katana by several centuries and differs in three key ways: overall length, curvature, and how it was worn. A tachi typically measures 70 cm or more along the blade, carries a more pronounced sori (curvature), and was suspended edge-downward from the belt — the opposite of the katana's edge-upward carry. This suspension method influenced the geometry of the blade curve, which was optimized for a drawing arc from a mounted position. For collectors, this means a tachi presents a distinctly different profile on display, with a longer, more sweeping silhouette that commands more visual space than a standard katana mounting.