Yorokobi SLD Rainbow Damascus Tsuchime Kiritsuke 210mm (Blade Only)
The Workshop (Knife Builder)
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SPECIFICATIONS
Knife Style: Kiritsuke
Steel Type: Semi-Stainless Steel*
Blade Material: SLD (Hitachi)
Blade Finish: Rainbow Damascus (Copper) w/ Spine Damascus Exposed
Blade Hardness: 62HRC (+/-1)
Bevel: Double
Handle: None ➛ Choose yours
Blade Length: 210mm
Heel Height: 50mm
Spine Thickness: Xmm (Coming Soon!)
Weight: 129g
Hatsukokoro is more than just a name—it’s a quiet homage to Japan’s deep respect for craftsmanship, tradition, and the artisans who shape each blade. Since 2013, from their workshop in Amagasaki City, Hatsukokoro has partnered with some of Japan’s most skilled but often uncredited smiths, sharpeners, and handle makers. Their house brand exists to bring these masters’ work into the spotlight, letting the knives themselves speak.
Introducing the Limited Edition Yorokobi Series—one of Hatsukokoro’s most exceptional and visually striking creations. This exclusive edition is forged from Rainbow Damascus with red-copper shims, resulting in a blade that blends technical mastery with dramatic aesthetic character.
What sets this Yorokobi apart is not just the Damascus itself, but the way it’s showcased. The spine is fully ground to expose the Rainbow Damascus layers and the shimmering red-copper shims all the way from heel to tip. Few knives display their layered construction so boldly. Under light, the copper catches a warm glow, contrasting beautifully against the darker kurouchi finish that surrounds it. Combined with the colourful Damascus core, each knife carries a one-of-a-kind pattern—impossible to replicate and unmistakable at a glance.
Built in the Sanjo tradition, the blade starts with a thick, reassuring spine that transitions smoothly into a razor-keen, thin cutting edge. The grind is responsive and agile, offering excellent control during fine prep while maintaining the sturdy handling Sanjo knives are known for.
This limited Yorokobi edition is both a collector’s showpiece and a high-level performer. The marriage of Rainbow Damascus, red-copper shims, and exposed-spine construction creates a knife that stands out in any setting—each one produced in very small numbers and crafted with an attention to detail that borders on obsessive.
Kakushin can handle the blade-to-handle assembly for you at our shop. If you're new to the custom knife world and want to confirm the fit and sizing of a handle with a specific blade, feel free to reach out!
