Tosa Tsuboya Kiritsuke Gyuto 190mm Aogami No. 2 Kurouchi

Limited Edition — Exclusively for Only Sharp

The Tosa Tsuboya Kiritsuke Gyuto 190mm is an exceptional Japanese kitchen knife forged traditionally in Kochi Prefecture (Tosa), made directly for our Only Sharp store. The Kiritsuke Gyuto is a hybrid shape combining the versatility of a gyuto with the elegant tip of a kiritsuke — an ideal choice for chefs looking for one knife for most kitchen tasks.

The blade, made from Aogami no. 2 (Blue Steel #2) with a rustic kurouchi finish, retains the authentic character of the forge. The kurouchi layer protects the steel and gives the knife a raw, artisanal aesthetic. The edge is hand-ground to an asymmetrical geometry, ensuring exceptional sharpness and cutting precision.

Specifications

• Blade Length: 190 mm
• Overall Length: approx. 320 mm
• Steel: Aogami no. 2 (Blue Steel #2)
• Blade Finish: Kurouchi (forged, unpolished finish)
• Shape: Kiritsuke Gyuto (hybrid)
• Handle: Wenge wood, 130 mm length, wa-style (Japanese octagonal shape)
• Manufacturer: Tosa Tsuboya, Kochi Prefecture, Japan
• Edition: Limited, exclusively for Only Sharp

Materials

• Blade: Aogami no. 2 — high-carbon steel with excellent ability to achieve and maintain extreme sharpness. Carbon content ~1.0–1.2%, added tungsten and chromium for improved durability.
• Handle: Wenge — African tropical wood with dark, distinctive grain and natural moisture resistance. Pleasant to the touch, ergonomically shaped.

Blade Features

• Hand-forged and ground in a traditional Japanese forge
• Kurouchi finish — authentic, rustic look straight from the forge
• Excellent sharpness and edge retention (HRC ~62–64)
• Asymmetrical grind (typically 70/30 or 80/20)
• Suitable for slicing vegetables, meat, fish, and delicate tasks

Care and Maintenance

• Aogami no. 2 steel is not stainless — dry the knife thoroughly after each use
• Apply a thin layer of camellia or neutral oil for longer storage
• Wash by hand only, never in a dishwasher
• Sharpen on Japanese whetstones (we recommend #1000 + #3000–6000)
• Do not chop hard bones or frozen foods

Warning

This knife is made of high-carbon steel and is subject to patination and corrosion if not properly maintained. Patina is a natural process that protects the steel — it is not a defect of the product. The knife is intended for experienced users who understand how to care for carbon steel. Keep out of reach of children.