The TOSA KUROUCHI Fish Filleting & Slicing Knife is a masterpiece from Yoshimune knives. This knife is handcrafted by Tosa blacksmiths who have inherited over 400 years of steel forging techniques. It is forged and shaped from steel heated in a 1000°C furnace, leaving the oxidized black surface intact after cooling—a characteristic feature of traditional methods. The robust, handmade appearance adds to its distinctiveness. Tosa is a major steel production area supplying many forged blades to Sakai, Osaka, with numerous blacksmiths upholding these traditional techniques. However, with an aging blacksmith population and a shortage of young successors, Yoshimune knives opened a factory-direct store in central Kyoto in March 2020, aiming to introduce the TOSA KUROUCHI knife to domestic and international customers, expand sales, and foster young craftsmen. This filleting knife was developed specifically for fish preparation, based on Tosa’s traditional double-beveled deba knife. Typically, fish preparation requires both a deba knife and a sashimi knife, but there was a demand for a versatile fish knife for home use and fishing enthusiasts. The TOSA KUROUCHI Fish Filleting & Slicing Knife is designed to handle everything from filleting to slicing sashimi with a single tool. Its double bevel makes it easy to use straight for general users, while the finely balanced medium-thick blade is ideal for push cuts and also allows for smooth sashimi slicing. Additionally, the core material features premium Yasuki Blue Steel, known for its high rust resistance, hardness, and excellent edge retention. This knife, skillfully crafted by Tosa blacksmiths, is exceptionally sharp and durable, allowing for convenient fish preparation, from filleting to sashimi. Although designed as a dedicated fish knife, it can also handle meat and vegetables, making it a versatile kitchen tool for daily use. As a steel knife, it is prone to rust; therefore, clean it after use and dry it thoroughly. To prevent chipping, avoid cutting frozen foods or bones. When sharpness decreases, sharpening with a whetstone will restore its original edge.

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