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Home | Japanese Kitchen Knives | Hatsukokoro Hayabusa 120mm Petty HAP40 Walnut Handle

Hatsukokoro Hayabusa 120mm Petty HAP40 Walnut Handle

$273.29
$273.29
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READ IMPORTANT DELIVERY OPTION INFORMATION

We are happy to have these high performance knives from Hayabusa in our lineup, great for busy professionals and home cooks who are looking for long edge life and can look after a moderately non stainless knife. 

These knives have a stainless cladding over a high alloy HAP 40 core with a walnut wa-style handle. The core can rust if left wet or with food on it so please dry off after use and washing, with use over time it will develop a dark patina. 

HAP 40 made by Hitachi's Yasugi Specialty Steels is a high alloy powder metal with exceptionally excellent edge holding and toughness. HAP 40 is not a stainless alloy but rusts slowly given it's rich alloy composition, sometimes referred to as 'semi-stainless'.

 

Everyday Prep

Good for veggies and boneless protein

Avoid Bones & Dense Foods

If you can't bite it, don't cut it.

Semi-stainless

Reacts very slowly with regular use.

Wide Kireba Bevel

Smooth, robust cutting feel.

Ambidextrous

Suitable for all users.

Petty

A small utility knife used for delicate work like peeling, trimming, and slicing small produce or herbs.

Listed Length:
Total Length: 242mm
Edge Length: 118mm
Heel Height: 28mm
Spine Thickness: 2.2mm
Weight:
Orientation: Ambidextrous

Blade Type:
Steel Type: HAP40
Steel Hardness (HRC): 65-67
Maintenance: Some Attention
Handle Type: Japanese (wa)
Handle Material: Walnut Buffalo Horn Ferrule Octagonal

  • This is a stainless steel knife made from thin, hard steel.
  • Hand wash and towel dry after use. Do not air dry or use the dishwasher. Regular neglect can lead to oxidation.
  • Avoid twisting, scraping, or use on dense or hard foods and surfaces to avoid early dulling and edge damage. If you wouldn't bite into it, don't cut it with this knife.
  • Use on wooden cutting boards only. Do not use bamboo, cheap plastics or metal cutting boards.

Dive Deeper

Medium-fine Single Bevel

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HAP40

Carbon (C): 1.20–1.35% | Chromium (Cr): 3.7–4.7% | Molybdenum (Mo): 4.6–5.4% | Tungsten (W): 5.6–6.4% | Vanadium (V): 2.8–3.3% | Cobalt (Co): 7.5–8.5%

HAP40 is Hitachi’s PM high‑speed steel delivering extreme hardness (~64–67 HRC) and superb wear resistance with workable toughness. It takes and holds a very fine edge for a long time; best in thin, high‑performance kitchen knives and fine slicers where edge life is paramount.

About Hatsukokoro


Hatsukokoro curates knives from skilled blacksmiths across Japan, bringing diverse regional styles under one name. “Hatsukokoro” means “First Heart,” reflecting a focus on foundational craftsmanship and quality. Instead of forging in-house, they partner with trusted makers to offer a wide variety of blades—each finished and sharpened to the brand’s high standards. Whether sourced from Tosa, Sakai, or Sanjo, Hatsukokoro knives emphasize thoughtful design, practical performance, and consistent quality. It’s a brand for cooks who appreciate variety, craftsmanship, and well-selected tools from across Japan’s knifemaking regions.

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