Katana Vermilion Grass Maru Blade Bokuka Koshirae 朱草Clay Tempered Full Tang Shinken () Vermilion Grass Katana: TangGu () Maru Blade () + TangGu () Bokuka Koshirae () The uchigatana style koshirae () combines traditional design with practical function. The blade is forged in Maru zukuri () style from proprietary high carbon steel, a monosteel construction for consistent strength and edge retention. The blade has no visible hada (). A Suguha with slight Midarehamon is created through clay tempering ().

Menuki (目貫): Double Vajra (金剛杵) motif menuki crafted from polished white copper

natural texture with understated depth

The saya (scabbard) is finished in raden-style black lacquer (螺鈿塗)

Habaki (鎺): A brass habaki engraved with the traditional Nekogaki (Cat-scratch / 猫掻) pattern

Handle Wrapping (柄巻): Brown silk (or cotton) tsuka-ito wrapped using hishigami（菱紙）in a diamond pattern

with hishigami（菱紙）inserting a diamond pattern

offering both structural strength and subtle organic beauty

Tsuba (Handguard 鍔): A Mokko-gata (木瓜形) tsuba crafted from brass（真鍮 / Shinchū）

while the vine represents enduring vitality

Minimalist Double-Ring Guard for Practical Use

and dignified—perfect for mounting as part of a complete koshirae

This blade is hand-forged (Tezukuri / 手作り) from in-house refined Oroshigane (卸し金) steel