Why do shikomizue blades tend to follow a straight profile?
Updated Feb 2026
The straight blade profile — shared with the ancient chokuto form — is largely a functional consequence of the mounting. A curved blade cannot be sheathed cleanly inside a straight cylindrical cane without either distorting the outer profile or requiring a dramatically oversized diameter, both of which would defeat the disguise. The straight grind also simplifies the fitment between blade and saya, ensuring a smooth draw without the rotational alignment issues that a curved blade would introduce in a round-profile mounting. From a collector's perspective, this constraint produces an aesthetically clean result: the blade's geometry echoes the simplicity of the outer form, and the hamon on a clay-tempered straight blade is particularly visible and photogenic along its full length.