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alt="Close-up of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm, showing its kurouchi finish, Shirogami #1 core steel, and Japanese characters near the textured blade contrasting with the polished edge."
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loading="lazy"
width="1500"
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alt="Close-up of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm, showing its kurouchi finish, Shirogami #1 core steel, and Japanese characters near the textured blade contrasting with the polished edge."
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alt="A close-up of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm shows its sharp blade with a Shirogami #1 core and textured upper section, resting on a grey surface."
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loading="lazy"
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alt="A close-up of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm shows its sharp blade with a Shirogami #1 core and textured upper section, resting on a grey surface."
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loading="lazy"
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alt="Close-up of a Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm blade, showing textured steel and engraved characters on the Shirogami #1 core against a dark, blurred background."
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loading="lazy"
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alt="Close-up of a Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm blade, showing textured steel and engraved characters on the Shirogami #1 core against a dark, blurred background."
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alt="A Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm chefs knife with a wooden handle lies diagonally next to a black box with Japanese characters, set against a gray background."
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loading="lazy"
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alt="A Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm chefs knife with a wooden handle lies diagonally next to a black box with Japanese characters, set against a gray background."
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alt="A centered close-up shows the tip of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm chef’s knife, its sharp edge vertical against a plain light gray background, with part of the handle visible at the bottom."
class="image-magnify-hover"
loading="lazy"
width="1500"
height="1500"
alt="A centered close-up shows the tip of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm chef’s knife, its sharp edge vertical against a plain light gray background, with part of the handle visible at the bottom."
class="image-magnify-hover"
loading="lazy"
width="1500"
height="1500"
alt="Close-up of the sharp edge and tip of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm, featuring a Shirogami #1 steel gray blade and a black handle, set against a plain light background."
class="image-magnify-hover"
loading="lazy"
width="1500"
height="1500"
alt="Close-up of the sharp edge and tip of the Yoshikazu Tanaka Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 240mm, featuring a Shirogami #1 steel gray blade and a black handle, set against a plain light background."
Ittosai Kotetsu Kurouchi 240mm Wa-Gyuto is a Japanese chef's knife from Sakai, Japan. Featuring Shirogami #1 core steel, prized for its peak sharpness, this knife benefits from Tanaka-san's renowned heat treatment, which optimizes the steel’s balance of hardness, toughness, and sharpenability. The blade has reactive iron cladding and a true kurouchi finish. It delivers exceptional performance for both home cooks and professional chefs.
Hand-forged in Sakai, Japan by Yoshikazu Tanaka
Sharpened by Shotaro Nomura
Cutting edge length: 228mm (8.98")
Core steel: Shirogami #1 for maximum sharpness
Bokashi finish on the blade road (not sandblasted) with a nail-flexing thin edge
Rustic aesthetic with a true kurouchi finish (see notes)
Reactive iron cladding develops a protective patina over time
For the care and maintenance of Japanese kitchen knives, such as this Kurouchi Japanese chef's knife, please refer to our care guide below.
Slight measurement variations are common in Japanese kitchen knives.
Small surface finish variations in knives are a normal part of the handcrafting process.
The faded spots on this knife are normal. This is an authentic kurouchi finish, not a 'painted' or chemically forced synthetic finish with a super smooth and homogenous appearance seen on other brands. Each Tanaka kurouchi knife in this series will show these natural variations.
Shipping & Returns
• Worldwide shipping from Tokyo via EMS/DHL • Ships within 24-48 hours • Online tracking included • 30-day returns on unused items Details
Care Guide
• Use whetstones for sharpening • Use wooden or rubber cutting boards • Keep clean and dry to prevent rust • Avoid cutting bones or frozen foods • Hand wash only - no dishwasher View Complete Care Guide
