Tosa Tadayoshi 210mm Sujihiki Aogami 1 Oct Magnolia /Horn

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Hand forged knives from the Tosa area of Shikoku Island, Japan's least populated island with a long history of smithing. Shikoku's thick forests, agriculture and fisheries have led to a local style of smithing that is characterized by rustic free forged knives and tools. Many Tosa knives are ryoba style; forged and ground symmetrically and are suitable for both right and left hand users.

Please note, these can have cosmetic scratches or small imperfections in handles which will not impede the performance of the knife. This is par for the course on these knives and is part of how they sell them for a very reasonable price. We have been very happy with the quality for the price and their old style country feel.

This is a reactive carbon steel. It should be mentioned that extra care is required, as the knife is not stainless and should be dried immediately after use. It will develop a dark patina with usage, but any orange rust should be removed with a light abrasive.

These knifes come from the maker with lacquer on the blade for corrosion protection during shipping. It can be removed using acetone or lacquer thinner (follow manufacturers instructions for use).

 

Everyday Prep

Good for veggies and boneless protein

Avoid Bones & Dense Foods

If you can't bite it, don't cut it.

Iron Clad Carbon

Reactive core steel between two reactive layers.

Wide Kireba Bevel

Smooth, robust cutting feel.

Ambidextrous

Suitable for all users.

Sujihiki

A sujihiki is a long, narrow Japanese slicing knife designed for clean, even cuts through cooked or raw proteins. Its thin blade reduces drag, allowing smooth, single-stroke slices that preserve texture and presentation. The pointed tip offers precision for trimming and detail work. Ideal for carving roasts, portioning fish, and producing uniform slices with minimal effort.

Total Length: 365mm
Edge Length: 219mm
Heel Height: 36mm
Spine Thickness: 2.71mm
Weight:
Orientation: Ambidextrous

Steel Type: Aogami 1 (Blue Paper #1)
Steel Hardness (HRC):
Maintenance: More Attention
Handle Type: Japanese (wa)
Handle Material: Ho (Magnolia) & Horn Ferrule

About Tosa Tadayoshi

Tosa, Kōchi, Japan

Tosa Tadayoshi knives come from Kochi Prefecture, home to over 400 years of blacksmithing tradition. These blades reflect the region’s rustic, free-forged style—handmade with character and performance in mind. Often featuring kurouchi finishes and durable double bevels, they’re crafted by a small team using time-tested techniques. Tadayoshi knives offer a practical, approachable introduction to carbon steel, valued for their sharpness, durability, and the distinct individuality of each piece. They reflect Tosa’s no-frills, work-ready knife ethos, made for daily use with deep roots in Japan’s cutlery heritage.

See All Tosa Tadayoshi

Medium-Fine finish - Japanese

We recommend sharpening by hand using whetstones starting around 1000 grit progressing to at least 4000 for this steel type and edge geometry. Finish with a monodiachrome strop for a smooth cut with a substantial bite. Finer finishes are possible, but the knife may slide on smooth foods and overall edge retention may suffer. During repair, use a super coarse stone to pass chips quickly to help keep flat bevels.

  • Avoid pull-through sharpeners and non-water-cooled mechanized systems.
  • Strops and ceramic honing rods are preferred for as-needed edge maintenance. If you have to use a honing rod to be able to use the knife comfortably, it's time to sharpen the knife.