Katana Abyssal Butterfly Hitatsura Hamon Kairyū Kagechō Koshirae 淵蝶 FS The Seigaiha fuchi-kashira set is

The Seigaiha fuchi-kashira set is crafted from white copper and adorned with the classical seigaiha wave motif

A black sageo (黒下緒) is traditionally tied to the kurigata

finished with a darkened patina

finished with a refined blackened patina (煮黒仕上げ)

preserving the natural character of the material and highlighting the timeless beauty of traditional metalwork

Katana Abyssal Butterfly Hitatsura Hamon Kairyū Kagechō Koshirae 淵蝶 FS The Seigaiha fuchi-kashira set isHitatsura Hamon Full Tang Shinken () Abyssal Butterfly Katana: TangGu () Maru Blade () + TangGu () Kairy Kagech Koshirae () This katana is hand forged (Tezukuri ) from high carbon modern steel () in the Maru zukuri () style. The blade is clay tempered (yaki ire ) to produce a Hitatsura hamon (full temper pattern ) that spreads dynamically across the surface, symbolizing untamed elemental energy. The koshirae features a maru gata tsuba () forged from