What makes tachi different from a katana for collectors?
Updated Mar 2026
The tachi predates the katana by several centuries and differs in three measurable ways that matter to collectors. First, tachi typically measure 70 cm or more in blade length, longer than the standard katana. Second, the curvature (sori) is more pronounced and positioned closer to the base of the blade rather than toward the middle. Third, tachi were traditionally worn suspended edge-downward from the belt, while katana are worn edge-up through the obi. For display purposes, this means a tachi should ideally be mounted horizontally with the edge facing down to honor its historical orientation. Collectors who understand this distinction often find tachi more compelling as display centerpieces precisely because the form communicates an earlier, more formal chapter of Japanese sword history.