Katana Vajra Maru Blade Kongo Koshirae 大椿 Tsuba Heat treatment is performed in

Heat treatment is performed in a Nadcap-certified vacuum heat-treating facility

giving the surface a deep

and long-lasting durability

the same principle employed in traditional tamahagane blades to achieve both sharpness and resilience

Katana Vajra Maru Blade Kongo Koshirae 大椿 Tsuba Heat treatment is performed inShinken () 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