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Tosa-ichi

The family of high carbon steel edge kitchen knives cladded with soft stainless outer. Blades are processed (several series are roll-forged) and finish-sharpend by Hokiyama factory craftsmen. Because the outer layer of the blade is made of extremely soft stainless, it’s so easy to sharpen on your demand, and also its traditional core steel provides us with sensitive cutting touch. Note: The edge is easy to get rusted, if the blade is not properly cared.

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Tosa-ichi Shadow 

Nashiji / Tsuchime Mahogany Pakka collar Octagonal Zelkoba handle models

Aogami Super / SUS405 clad steel

Manufactured in Japan

tosaichi_kage

HITACHI's finest YSS

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals, Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands. And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives. Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword. Aogami is the reformed group based on Shirogami by adding Chromium & Tungsten for stable heat-treatment and wear-resistance feature. The group is further segmented into Aogami 2, Aogami 1, Aogami Super, whose Carbon, Chromium, Tungsten blending ratio is much higher by the order, and each element effects to the blade HRC hardness and wear-resistance.

Aogami  Super  is  outstandingly  rich  in  Carbon  composition (1.45%) which directly effects to the blade hardness and also containing 0.4% Vanadium as the additive for micronizing metal grains to add the blade toughness. Thus Aogami Super is rated as the most advanced carbon steel for the modern knife making.

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Aogami Super / SUS405 Clad Steel

The core for Tosa-Ichi Shadow series, Aogami Super’s edge hardness is HRC63. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening. This stainless part matte black is the stark color after the quenching process.

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It’s the common oxidized metal color with the forged oxide iron skin known as Kuro-uchi traditional blades. In another words, Tosa-Ichi Shadow is the corrosion-resistant armored “Neo Kuro-Uchi“. 

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150621 牛刀 Chef's 210mm

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Tosaichi Shadow   Nashiji Black

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150330 文化 Bunka 170mm

Tosaichi Shadow   Tsuchime Black

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Tsuchime Mahogany Pakka collar Octagonal Zelkoba handle models

Aogami Super / SUS405 clad steel

Manufactured in Japan

Tosa-Ichi Bright 

tosaichi_Bright

HITACHI's finest YSS

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals(Currently:Proterial, Ltd.), Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands. And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives. Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword. Aogami is the reformed group based on Shirogami by adding Chromium & Tungsten for stable heat-treatment and wear-resistance feature. The group is further segmented into Aogami 2, Aogami 1, Aogami Super, whose Carbon, Chromium, Tungsten blending ratio is much higher by the order, and each element effects to the blade HRC hardness and wear-resistance.

Aogami  Super  is  outstandingly  rich  in  Carbon  composition (1.45%) which directly effects to the blade hardness and also containing 0.4% Vanadium as the additive for micronizing metal grains to add the blade toughness. Thus Aogami Super is rated as the most advanced carbon steel for the modern knife making.

YSS_LOGO_3x-100.jpg

Aogami Super / SUS405 Clad Steel

The core for Tosa-Ichi Bright series, Aogami Super’s edge hardness is HRC63. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening.

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tosaichi_Ao

Tosa-Ichi Ao

Hair-line polished finish / Buffaloe Horn collar octagonal magnolia handle models

Aogami Super / SUS405 clad steel

Manufactured in Japan

tosaichi_Ao

HITACHI's finest YSS

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals(Currently:Proterial, Ltd.), Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands. And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives. Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword. Aogami is the reformed group based on Shirogami by adding Chromium & Tungsten for stable heat-treatment and wear-resistance feature. The group is further segmented into Aogami 2, Aogami 1, Aogami Super, whose Carbon, Chromium, Tungsten blending ratio is much higher by the order, and each element effects to the blade HRC hardness and wear-resistance.

Aogami  Super  is  outstandingly  rich  in  Carbon  composition (1.45%) which directly effects to the blade hardness and also containing 0.4% Vanadium as the additive for micronizing metal grains to add the blade toughness. Thus Aogami Super is rated as the most advanced carbon steel for the modern knife making.

YSS_LOGO_3x-100.jpg

Aogami Super / SUS405 Clad Steel

The core for Tosa-Ichi Ao series, Aogami Super’s edge hardness is HRC63. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening.

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tosaichi_sirakumo

Tosa-Ich Shirakumo

Tsuchime (Dimple) finish / Buffaloe Horn collar octagonal magnolia handle models

Shirogami 2 / SUS405 clad steel

Manufactured in Japan

tosaichi_sirakumo

HITACHI's finest YSS

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals(Currently, Proterial Ltd.)Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands.

And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives.

Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword.

Shirogami 2 steel is a carbon steel made from iron sand-based raw materials and containing extremely few impurities that would be detrimental to the performance of the steel.

It is a common steel used for kitchen knives, machetes, and many other blades, but its quality is high, and the less impurities it contains, the more difficult it is to control the hardening temperature and the more skillful the processing is required.

Compared to aogami steel, shirogami steel can be more easily resharpened with a whetstone, has a primitive sharpness that cuts through food, and is easy to handle even for ordinary households.

Shirogami 2 / SUS405 Clad Steel

The core for Tosa-Ichi Clouds series, Shirogami 2 steel edge hardness is HRC62. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening.

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Tosa-Ich Saiun

Tsuchime (Dimple) finish / Black-Pakka collar octagonal walnut handle models

Shirogami 1 / SUS405 stainless clad blade

Manufactured in Japan

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HITACHI's finest YSS

Shirogami 1 / SUS405 Clad Steel

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals(Currently, Proterial Ltd.)Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands.

And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives.

Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword.

Tosa-Ichi Saiun uses Shirogami No. 1, which is highly regarded as the best cutting steel among these carbon steels, and its extremely sharp blades are ideal for cooking that requires delicate cutting.

In addition to having the highest carbon content among the Shirogami group, the low level of impurities makes it difficult to control the temperature of heat treatment, but we have overcome this issue by the specifically developed cooling tank, which maximises the performance of the steel.

The core for Tosa-Ichi Purity White series, Shirogami 1 steel edge hardness is HRC62. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening.

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Lengthwise polished elegant blade with blasting finish 

Buffaloe Horn collar octagonal magnolia handle models

Shirogami 1 / SUS405 clad steel

Manufactured in Japan

tosaichi_hakusui

Tosa-Ichi Hakusui

tosaichi_hakusui

HITACHI's finest YSS

Shirogami 1 / SUS405 Clad Steel

YSS(Yasugi Specialty Steel) is produced by Hitachi Metals(Currently, Proterial Ltd.)Yasugi works in the San’in region of Japan, a place renowned for the high purity of its iron sands.

And their high carbon steels are classified as Shirogami and Aogami for its chemical composition & additives.

Either is characteristic heritage steel created by Hitachi’s intelligent alloy design, smelting expertise passed down tradition of Tatara iron-making for Japanese sword.

Yasugi shirogami 1 steel used in this series is one that can achieve the most delicate cutting performance among carbon steels. It has a reputation for the beautiful cross section of the cut food, and is favored by many top chefs.

It is made using a recipe that further increases the carbon content from shirogami 2 steel, making heat treatment difficult, but we have adapted a specifically developed cooling tank to achieve stable mass production.

The core for Tosa-Ichi Purity White series, Shirogami 1 steel edge hardness is HRC62. The combination with the soft stainless SUS405 outer layer provides further easiness to the blade sharpening.

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YSS_LOGO_3x-100.jpg
土佐一珀粋.jpg
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