Kohetsu HAP40 Petty 150mm

The Kohetsu HAP40 line is made exclusively for CKTG by the Tsukahara family in Seki City, Japan - the same specialist shop that produces the Kohetsu Aogami Super line. Seki operates as a distributed craftsman network: forgers, grinders, sharpeners, and handle fitters each own one stage of production, with blades moving between shops in plastic crates on small delivery trucks. Mark visited and toured these shops personally. The Tsukahara family specializes in the precise heat treatment that brings HAP40 to 65-66 HRC consistently - a harder target than most steels and one that requires real expertise to hit reliably.

The petty at 150mm sits at the longer end of the petty range - long enough for comfortable board work, compact enough for in-hand trim work where a gyuto would feel excessive. The thin grind lets the blade pass through food with minimal resistance, and the 60/40 asymmetric edge - biased right with a feathered tip - works equally well for right- and left-handed cooks. Stainless san-mai cladding over the HAP40 core keeps daily maintenance straightforward. Octagonal dark grey pakka wood handle, light and well finished. CKTG is the only source for the Kohetsu HAP40 line.

What Customers Are Saying: Reviewers praise the out-of-the-box sharpness and the edge retention that keeps performing through weeks of use without touching a stone. One cook bought this petty after being impressed by the 240mm gyuto and returned to add the honesuki to the collection as well.

Care Instructions: HAP40 is a semi-stainless steel - the stainless cladding fully protects the flanks and the HAP40 core has meaningful corrosion resistance, but hand washing and drying after each use is still best practice. Avoid the dishwasher. HAP40 at 65-66 HRC is harder than most kitchen steels - use wood or rubber cutting boards only and avoid bones, frozen foods, and hard materials that could chip the edge. Sharpen on quality water stones; HAP40 sharpens more easily than most powdered steels but rewards patience and consistent angle. Strop regularly between sharpenings to maintain peak performance.

• Brand: Kohetsu
• Exclusive: CKTG Exclusive - Available Only at CKTG
• Blacksmith: Tsukahara Family
• Location: Seki City, Japan
• Construction: Laser Cut, San Mai
• Edge Steel: HAP40 Semi Stainless (Powdered High Speed Steel)
• Cladding: Stainless Steel
• HRC: 65-66
• Edge Grind: 60/40 Asymmetric Double Bevel
• Etching: Acid Etched Kanji
• Handle: Octagonal Dark Grey Pakka Wood
• Blade Length: 150mm