The Craftsmanship of the Time-Honored Black Bird Forge: Razor-Sharp Tosa-Uchihamono Blades
2025.06.09
The Craftsmanship of the Time-Honored Black Bird Forge: Razor-Sharp Tosa-Uchihamono Blades
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Kurotori Forge, a blacksmith based in the mountains of Kochi Prefecture, crafts an array of blades including kitchen knives, hatchets, and outdoor knives. At this forge, artisanal skills have been handed down for over 150 years.
The Tosa-Uchihamono cutlery from this forge are created using free forging, where metal is heated to high temperatures and hammered into shape at will. Because their roots lie in practical forestry and agricultural tools, these blades are prized not just for their sharpness, but also for their durability and ease of maintenance.
Committed to handcrafting rather than mass production, their techniques have earned admiration among chefs, hunters, and even campers. In this article, we interviewed the company’s representative, Kajihara, about the traits of their knives, their production methods, and the allure of Tosa-Uchihamono.
PROFILE
Hiroshi Kajihara

Sixth Generation of Kurotori Forge

Born in 1979 in Shimanto Town, Kochi Prefecture. After working as a carpenter and tinsmith, took over as the sixth-generation head of his family’s business, "Kurotori Forge."
He is also dedicated to training the next generation of young blacksmiths.

Sharpness Only Achievable by Artisans


Kurotori Forge began as a branch of the main Kurotori (Kawashima family), recognized as one of Tosa’s leading blacksmiths. In its early days, the forge mainly produced forestry blades essential to the local community, such as planting sickles and branch-cutting hatchets.

Blacksmiths who make agricultural, fishing, and daily tools are called "field blacksmiths (野鍛冶)," notable for crafting tools tailored in size and weight to the user’s needs. This forge continues this field-blacksmith approach, handling everything from production to maintenance.

"Drawing on the foundation of durability and sharpness in forestry blades, we’ve evolved as a field blacksmith by serving the requests of the local community. Today, we fulfill detailed requests such as adjusting the shape or balance of knives, creating practical blades tailored specifically to individual customer needs."

Since the COVID-19 pandemic, demand from inbound customers has risen, and some requests can even lead to a two-year wait.

While some machinery is used as needed, the majority of manufacturing is still done by hand. They forge about 50 pieces and perform heat treatment on about 200 per day, but due to the time-consuming process of heat treating and sharpening, only about 10 finished blades are completed each day.

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