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.
Tosa-ichi Shadow
Nashiji / Tsuchime Mahogany Pakka collar Octagonal Zelkoba handle models
Aogami Super / SUS405 clad steel
Manufactured in Japan
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.
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.
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“.
150621 牛刀 Chef's 210mm
Tosaichi Shadow Nashiji Black
150330 文化 Bunka 170mm
Tosaichi Shadow Tsuchime Black
Tosa-Ichi Bright
Tsuchime Mahogany Pakka collar Octagonal Zelkoba handle models
Aogami Super / SUS405 clad steel
Manufactured in Japan
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.
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.
Tosa-Ichi Ao
Hair-line polished finish / Buffaloe Horn collar octagonal magnolia handle models
Aogami Super / SUS405 clad steel
Manufactured in Japan
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.
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.
Tosa-Ich Shirakumo
Tsuchime (Dimple) finish / Buffaloe Horn collar octagonal magnolia handle models
Shirogami 2 / SUS405 clad steel
Manufactured in Japan
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.
Lengthwise polished elegant blade with blasting finish / Buffaloe Horn collar octagonal magnolia handle models
Shirogami 1 / SUS405 clad steel
Manufactured in Japan
Tosa-Ichi 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 developed a special cooling tank to achieve 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.
