Ittosai Kotetsu Gokujo kurouchi shirogami#1 gyuto 210mm

Specifications

Only one remaining—the actual piece shown

The Ittosai Kotetsu Kurouchi 210mm 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, delivering exceptional performance for both home cooks and professional chefs.

• Hand-forged in Sakai, Japan by Yoshikazu Tanaka
• Sharpened by Shotaro Nomura
• 198mm (7.80") cutting edge length
• Shirogami #1 core steel 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
• Smoothed choil for comfort

Details

• Brand: Ittosai Kotetsu
• Blacksmith: Yoshikazu Tanaka
• Sharpener: Shotaro Nomura
• Producing Area: Sakai, Japan
• Knife Type: Wa-Gyuto
• Finish: Kurouchi (see notes)
• Core Steel: Shirogami #1
• HRC: ~63
• Steel Type: Carbon Steel
• Cladding: Iron-Clad

Blade & Handle Specs

• Overall length: 350mm
• Blade length (heel to tip): 200mm (7.87")
• Blade height at heel: 45.6mm
• Spine thickness:
  • At the handle: 2.7mm
  • At the heel: 2.4mm
  • Midway: 2.0mm
  • 1cm from the tip: 1.4mm
• Weight: 148g
• Edge/bevel: 50:50
• Handle: Octagonal magnolia with horn ferrule
• Hand Orientation: Ambidextrous
• Saya/Sheath: Not included

Notes

• For the care and maintenance of Japanese kitchen knives, such as this 210mm 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.