Hatsukokoro HAP40 Petty 120mm

Regular price £145.00

Currently out of stock

Hatsukokoro HAP40 Petty 120mm Purchase options

Like its counterparts in the range, this petty is both light and nimble and a perfect size for the more intricate jobs where precision and an excellent edge are always needed.

First Impressions

Sharp out of the box and there's definitely scope to pretty easily get a truly screaming sharp edge with a little work on a stone or with a ceramic rod. 

The blade shape is stamped and then sharpened and finished by hand to ensure a consistent and quality finish across the knives.


This is perhaps not a range you're going to buy based entirely on its looks. It's a classic polished finish with a visually interesting and consistent grind exposing the HAP40 steel core and the Kanji is 初心 meaning 初 (innocent) 心 (spirit).

In Hand

The entire range is impressively lightweight and overall they're pretty thin all the way along the spine and taper nicely. The heel of the knife is comfortable but it would be nice if it were just a little more rounded and finished around the edges for added comfort.


Made by Hitachi Metals Limited, HAP40 is a steel that is well regarded for its hardness and the treatment of this range is around 64-65 HRC so edge retention is excellent and these are durable knives when looked after correctly.

The durability and edge retention is the big feature of this range.

Ease of Care

These are a semi stainless knife so we'd recommend caring for them following the normal rinse and dry routine but it would also be worth applying drop or two of camellia oil from time to time as HAP40 steel has a chromium content but it's worth the extra care for the edge retention properties it offers.

Our Verdict

This range is an interesting combination of stamped blade production and then sharpened and the handles fitted by hand.

There's a great level of consistency across the knives in the range and for the most part, you're paying for the HAP40 steel which is going to take and retain an excellent edge and offers a high level of durability despite it's thin profile.

Overall, an impressively light but solid knife that's going to last.

Product details

  • Blade Length: 120mm (Measurement of the cutting edge)
  • Steel Type - Cladding: Stainless
  • Steel Type - Core: HAP40
  • This knife is made from a reactive carbon steel which is not stainless and has some special care instructions and properties – Read our carbon steel care guide here

  • Left or Right handed: Either
  • Hardness: 64-65 (HRC)
  • Handle Style: Japanese
  • Handle Material: Octagonal walnut

Product SKU: 9001

Our aim is to measure and photograph all our products as accurately as possible but due to the handmade nature of many items, please be aware that there may be some variance in the measurements and that things such as blade and knife handle patterns can vary and presentation boxes may differ from those shown but we will always endeavour to provide the most accurate measurements, photos and descriptions of our products.

Some measurements such as HRC are provided by the manufacturer and should therefore be used as a guide.

Blacksmith Profile

Hatsukokoro Seki City

Made in Seki City, Japan the HAP40 is a machine stamped blade that benefits from the attention to detail of a hand sharpening and finishing process .

View all Hatsukokoro Seki City knives

You might also like these

Helping you find the perfect knife

Cutting Edge Knives is a small family run business based in Huddersfield, West Yorkshire. We love the history and craftsmanship that goes into making Japanese chef knives and the excitement and enjoyment you experience when using a truly sharp knife in the kitchen.

Since 2011 we've helped thousands of happy customers find the perfect knife for their cooking and hope to serve you soon.

Ally & James

About us  |  Our promise  |  Contact us