Black Rayskin Wrapped Saya 黒鮫皮Handcrafted Black Rayskin Wrapped Saya with Natural Horn FittingsKoshirae Grade Finish This handcrafted saya is a Black RayskinWrapped Saya (), featuring a deep black finish that adds distinctive texture and visual depth, providing a refined yet powerful alternative to conventional lacquer only saya. The black tone conveys strength, restraint, and formality, while preserving the understated aesthetics of traditional craftsmanship. The koiguchi

the habaki (鎺) is crafted from brass (真鍮)

Samegawa (Ray Skin 柄鮫): Premium natural ray skin

lending the iron a deep

resilient spine

completed with blackened patina

The fuchi-kashira（縁頭） are blackened brass（煮黒真鍮） crafted in nanako-ji texture（魚子地） and engraved with traditional family crest motifs（家紋彫り / Kamon-bori）

shaped in a stylised ken (sword / 剣) motif

The habaki (鎺) is forged from brass and engraved with the traditional Nekogaki cat-scratch pattern (猫掻)

Menuki (目貫): Made from hakudo (白銅)

Fuchi-Kashira (縁頭): Brass with blackened patina (煮黒仕上げ)

with a hardened outer steel shell around a softer core — the same method used in tamahagane blades to achieve both strength and resilience

and unique artistry