Quick view Skyjiro Skyjiro Ancient Warrior 1070 Spring Steel Unokubi Zukuri Samurai Katana Sword $429.00 This is the Skyjiro Ancient Warrior 1070 Spring Steel Unokubi Zukuri Blue Katana. The blade is made of 1070 high carbon spring steel and features an unokubi zukuri geometry with double bohi and chu-kissaki. The blade has a cosmetic hamon added to it for... Compare Out of stock