Why does the ninjato have a straight blade instead of a curved one?
Updated Feb 2026
The straight chokuto profile of the ninjato distinguishes it from the curved tachi and katana lineages. Historically, Japanese swords were straight before curved blades became dominant during the late Heian period, so the chokuto form actually predates the katana. The ninjato revives that older geometry in a context traditionally associated with shinobi culture: a shorter, straighter blade that fits into tighter spaces and offers a direct, linear draw from the saya. For collectors, the straight silhouette provides a striking visual counterpoint to curved swords in a display arrangement. It also showcases the hamon differently — because the flat runs in a continuous plane without curvature, the temper line reads as a single unbroken ribbon from habaki to kissaki, giving the eye an uninterrupted view of the clay tempering artistry.