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JCK Natures

JCK Natures Blue Moon Series Wa Petty (135mm and 165mm, 2 sizes)

Availability: Normally ships the same day

This beautiful traditional forged knife is called “Blue Moon”, which is青月Seigetsu” in Japanese. This is because we felt that the unique Tsuchime (“Hammered pattern”) dimples and dark-colored Kurouchi (“Black forged”) finish of the blade looked just like the cratered surface of the Moon.

The core of the blades is made from Hitachi Blue Steel No.2 Japanese high carbon steel, which is sandwiched between soft stainless steel for improved corrosion resistance, and thus reduced maintenance. Blue Moon Knife is hand ground and sharpened, and have very good overall fit and finish.

The oval-shaped handles are suitable for both right-handed and left-handed users. They are made of Chestnut wood with black resin ferrule.

A mainstay of professional Western kitchens, the Petty knife is a small general-purpose knife used for peeling, shaping, and slicing fruits and vegetables, chopping herbs, and making garnishes. The compact size and relatively narrow blade of the Petty knife mean that it is very nimble and controllable, thus it is ideal for making precise cuts.

Knife Model: JCK Natures Blue Moon Series Wa Petty

Blade Material:  Blue Steel No.2 Clad

Rockwell Hardness (HRc): 62

Blade Grind and Edge Shape: Double Bevel Edge 50/50

Handle Material: Oval Shaped Chestnut Wood Handle with Black Resin Ferrule

Saya Included: No.


Wa Petty 135mm (5.3")
Cutting edge length: 140mm (5.5")
Total Length: 255mm (10.0")
Blade Thickness: 3.4mm (0.13")
Blade Width: 31mm (1.2")
Handle Length: 107mm (4.2")
Total Weight: 80g (2.8oz)

Wa Petty 165mm (6.4")
Cutting edge length: 170mm (6.6")
Total Length: 305mm (12.0")
Blade Thickness: 3.6mm (0.14")
Blade Width: 38mm (1.4")
Handle Length: 124mm (4.8")
Total Weight: 127g (4.4oz)



This knife comes with 50/50 double bevel edge geometry for both right and left handed use.

For your information, Japanese Kitchen knives are generally designed for right hand use with a slightly thicker and rounded grinding on the right side blade and a less rounded (almost straight flat) grinding on the left side blade. However, both right and left hander can use the knives that have double bevel edge sharpened 50/50 without problems. 

We believe the quality and cutting performance of Japanese knives are the best in the world, and hope you enjoy the fine craftsmanship and its sharp edge with your new knife. With proper cares, every Japanese knife should be your special cooking partner for a long time.



This is the Carbon steel blade kitchen knife that can get rust and discolor easily, and requires extra care and attention to prevent rust.

  • Please do not put the knife in the dishwasher machine for cleaning.
  • Please do not leave the knife in water or wet condition for a long time.
  • After using, please hand wash the blade, bolster and handle thoroughly, and wipe it clean and dry with soft clothes. Please apply Tsubaki oil on the blade and keep it in a dry place.
  • This is an extremely sharp knife. Please use special cares in using and storing it.
  • Unlike German made knives, Japanese knife blades are ground to thin cutting edge for sharper cutting and easier re-sharpening. Please protect the edge from hitting hard materials to avoid chipping or cracking.
  • Please do not use it to cut bone or frozen foods, any hard shell foods such as lobster and crab.
  • We recommend using Japanese whetstones to re-sharpen the knife, when it gets dull.
Customer Reviews
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Filter Reviews:
    Carol T.
    United States United States
    I recommend this product

    Japanese Chef’s Knife

    Purchase this knife as a gift for my son-in-law. He’s an excellent cook add requested this knife after researching the Internet. He absolutely loves the knife and looks forward to adding future knives in the near future. The service from the company was outstanding, and they have followed up to make sure everything arrived on time, and that we were pleased. I highly recommend the Japanese chefs knife.

    A JapaneseChefsKnife.Com Customer
    Mark F.
    United States United States
    I recommend this product

    Beautiful, sharp, a pleasure to use

    I am a bit at a knife geek and believe that carbon steel knives live this offer incredible performance at a great price. Now, it is carbon steel and requires care, but it is worth it.

    Damani K.
    United Kingdom United Kingdom
    I recommend this product


    the steel and blade is lovely, i enjoy to sharpen and use. only downside is the fit on to handle is not completely straight, it bends slightly to one side - not a big issue when using a pinch grip but handle grip would be awkward, also plastic ferrule aesthetically. Overall good value though.

    Daniel P.
    United States United States
    I recommend this product

    Wa Petty Knife

    This is my wife’s favorite knife. Easy for her to handle. Best everyday knife.

    David M.
    Australia Australia
    I recommend this product

    JCK Natures Blue Moon Series Wa Petty 165mm

    Absolutely superb piece. I'm glad I went with the 165mm - it is the perfect balance between a smaller petty and a gyuto yet can hold it's own amongst the two. I've owned it for nearly a month now and the blue is starting to come through!

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