Spring Steel Blue Blade Katana Sword with Koi Carp Painted White Saya and Gold Copper Tsuba

This katana features a hand-forged spring steel blade measuring 28.74 inches, heat-treated to 58 HRC hardness. The entire blade surface carries a deep blue finish that transitions from a dark steel blue along the spine to a brighter cerulean near the kissaki. A pronounced hamon line zigzags along the length in a jagged, lightning-like pattern, creating a bold contrast against the blue ground. The edge is hand-finished to a refined profile, and the full tang construction ensures structural integrity throughout.

The 10.23-inch tsuka is built on a hardwood core wrapped first in white PU samegawa, then bound tightly with dark blue cotton ito in a traditional diamond pattern. White rayskin diamonds peek through at even intervals, providing both visual contrast and a textured grip surface. A dark blue sageo cord ties the assembly together at the saya mouth.

The tsuba is crafted from real copper and stands out immediately with its dual gold-and-silver tone finish. The design features elaborate openwork scrolls and a central crest motif, with the gold portions polished to a mirror sheen and the silver edges left in a matte finish. This ornate guard serves as a natural transition between the blue blade and the dark handle.

The 30.7-inch hardwood saya is coated in piano lacquer with a silvery white base. Its lower half showcases a hand-painted koi carp scene - vivid orange and red fish swim through gray wave patterns, a traditional Japanese symbol of perseverance and strength. The koiguchi area remains clean white, while the saya tip transitions into the same deep blue as the blade, tying the entire piece together visually. Browse more options in our Blue Blade Katana collection or explore the White Scabbard Katana series for similar styles.

At 40.5 inches overall and 2.88 lbs, this katana balances presence with manageability. Every component - from the copper tsuba to the lacquered koi saya - is assembled by hand, making it a distinctive collectible piece for enthusiasts of Japanese sword craftsmanship.