Katana Vajra Maru Blade Kongo Koshirae 大椿Shinken () Vajra Katana: TangGu () Maru Blade () + TangGu () Kongo Koshirae () This koshirae combines practical construction with a traditional aesthetic. The saya is finished in black lacquer with a speckled shimmer. The koiguchi, kurigata, and kojiri are reinforced with water buffalo horn. A black sageo is tied in a standard pattern. The tsuka has a black ito wrap over natural white samegawa (ray skin), with hishigami (paper inserts) used for

The saya（鞘）is finished in raden-style lacquer（螺鈿塗）with a black base and embedded shell fragments

For other dimensions

Chinese lion) motif finely engraved in katakiri-bori (single-line carving)

The green tone conveys freshness

Forging Pattern (Hada 鍛肌): The blade shows masame-hada（柾目肌）with long

shimmering with refined elegance

Samegawa (Ray Skin 柄鮫): Aged natural white ray skin（本鮫皮 / 古風仕上げ Kofū Shiage）under the tsuka wrap

The uchigatana-style koshirae (打刀拵) blends traditional craftsmanship with robust functionality

Fuchi-Kashira (縁頭): White copper fittings with engraved wave (海浪) motifs

The tsuka (柄) is wrapped in brown ito (茶色絹糸) over aged ivory samegawa (鮫皮)

and engraved with Kairyū (海竜

Perfect for complete koshirae mounting or as a lacquered art piece on its own