Specifications
- Brand: Ishizuchi Knife Factory ()
- Style: Santoku
- Blade Steel Type: White #1 Steel clad with Soft Iron
- HRC: 62-64
- Handle Material: Octagonal Walnuts Wood
- Ferrule Material: Yellow Poplar (compressed wood)
- Bevel Angle Ratio: Double Bevel (50/50)
- Blade Length: 165mm (6.5")
- Weight: 4.5 oz (128g)
- Cover: Not included
Precaution
- Tosa Hamono knives have a thicker spine compared to other Japanese knives, so regular Sayas may not fit.
- All Ishizuchi knives are Soft Iron Clad and may rust.
White #1 Steel
This hand-forged kurouchi knife is crafted from White 1 steel, a high-carbon steel known for its excellent sharpness, edge retention, and ability to take a fine, precise edge. With a carbon content of approximately 1.3-1.4%, White #1 provides superior cutting performance. The rustic black-forged kurouchi finish not only enhances the blade's aesthetics but also provides added rust protection. Ideal for professionals and serious home cooks, this knife offers traditional Japanese craftsmanship and outstanding performance.
About Kurouchi
Ishizuchi knives are renowned for their authentic kuro-uchi style. Unlike black-dyed knives that use a special coating for an overall black appearance, Ishizuchi’s “Kuro-uchi” knives retain the natural oxide film formed during quenching. This gives them a rugged, robust look and a handcrafted feel, showcasing true craftsmanship and traditional techniques.
“Black Rust”
Black rust, or protective rust, forms an oxide film on the surface of iron, preventing further rusting and avoiding the crumbling associated with red rust.
Sharpening Tip from Ishizuchi
Ishizuchi recommends sharpening the dominant side more for kuro-uchi knives, with a 40/60 bevel angle ratio for right-handed users and a 60/40 bevel angle ratio for left-handed users.
Ishizuchi Knife Factory
In 1590, warlord Chosokabe Motochika unified Tosa, documenting 399 blacksmiths in the region. Known for its forest-rich environment, Tosa required durable, high-performance tools for forestry, leading to the establishment of specialized blacksmiths. Following this tradition, Kajihira Tomika founded the Ishizuchi Agricultural Tool Company in 1920. Over 100 years later, they continue to maintain the distinctive thick, reassuring spine of Tosa knives while achieving the sharpness expected of fine Japanese knives.
About Santoku Knife
Santoku in Japanese transliterates as "three virtues" so they are otherwise known as "three purposes" knives. A santoku is meant to fulfill three purposes: cutting meat, vegetables, and fish. Its diminutive size and unique shape have made it very popular at home not only in Japan but in the United States. More and more home cooks are finding its versatility appealing without committing to a larger or more specialized knife.
