Katana Serpent Wave Folded Steel Blade Janami Koshirae 蛇濤 fully heat-treated ensuring precise proportions

ensuring precise proportions

Sageo (Cord 下緒): Black sageo

This process also creates a visible hamon（刃文）

crafted from white copper（白銅）with a blackened patina（煮黒仕上げ / Nibu-iro)

The tsuka (柄) is wrapped in yellow tsuka-ito over aged yellow samegawa (鮫皮)

Katana Serpent Wave Folded Steel Blade Janami Koshirae 蛇濤 fully heat-treated ensuring precise proportionsClay Tempered Ushimo hada Shinken () Serpent Wave Katana: TangGu () Folded Steel Blade () + TangGu () Janami Koshirae () This katana is forged in Maru zukuri () construction from hand forged and folded high carbon steel (). The surface reveals Ushimo hada (), a variation within the Masame hada () category, showing fine ox hair like straight grain lines. The edge displays a flowing notare () hamon, formed through traditional clay tempering ( Fukutsuchi