How does a shirasaya mounting differ from a standard katana koshirae?
Updated Feb 2026
A shirasaya is a plain, unadorned mounting made entirely from white magnolia wood, consisting of a saya (scabbard) and tsuka (handle) with no tsuba (guard), no menuki (handle ornaments), and no ito wrapping. Historically, shirasaya were used as storage mountings to protect a blade during periods when it was not in active use — they minimize the number of materials in contact with the steel and allow moisture to escape. A standard koshirae, by contrast, features a full set of fittings: wrapped ito over ray skin (samegawa), a decorative tsuba, and lacquered saya. O-Ren Ishii's sword in this collection uses a shirasaya format, making it a minimalist display piece where the silver flower fitting becomes the single focal point of ornamentation.