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Masamoto KS Series Hon Kasumi White Steel No.2 Wa Slicer (240mm and 270mm, 2 sizes)

Availability: Normally ships within 1 to 2 days

The KS Series is Masamoto’s range of high-grade Shiro-ko #2 (White Steel No.2) Hon Kasumi Japanese traditional-style knife. When compared with the Kasumi knife-making process, the production of Hon Kasumi knife requires several extra steps be carried out during the forging, quenching, sharpening and finishing stages of production and requires a higher level of craftsmanship. Unlike the KK Series, the KS Series is completely hand sharpened, polished and finished by especially skilled and experienced craftsmen, which results in extra edge sharpness and a more refined level of finish.

Masamoto KS Series knife uses a blade core of Hitachi White Steel No.2 (HRc. 62-63), which is forge-welded with soft iron. White Steel No.2 is very pure and is capable of achieving a high hardness level without being overly brittle, so it can be used to create very sharp edges with good edge retention that are also easy to sharpen. It is perfect for professional users who like to keep their knives extra sharp.

Each knife is fitted with a traditional Japanese ‘D-shaped’ magnolia wood handle with a water buffalo horn ferrule / collar and also includes a matching magnolia wood Saya (Sheath) for safekeeping.

The long, narrow blade of slicer is particularly useful for slicing meat, boneless fish, roast beef and ham. The long blade allows the meat or fish to be cut in one single drawing motion, from heel to tip.

Knife Model: Masamoto KS Series Wa Slicer

Blade Material:  White Steel No.2

Rockwell Hardness (HRc): 62 to 63

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

Handle Material: D Shaped Magnolia Wooden Handle with Water Buffalo Horn Ferrule

Saya Included: Yes.


Wa Slicer 240mm (9.4")
Cutting edge length: 245mm
Total Length: 405mm
Blade Thickness: 2.4mm
Blade Width: 35mm
Handle Length: 143mm
Total Weight: 114g
Wa Slicer 270mm (10.6")
Cutting edge length: 280mm
Total Length: 440mm
Blade Thickness: 2.4mm
Blade Width: 37mm
Handle Length: 146mm
Total Weight: 128g



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 their sharp edge of 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
5.0 Based on 6 Reviews
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Malaysia Malaysia
I recommend this product
Excellent buying experience

The service and speed of delivery is superb and as advertised - from Seki to my doorstep as quickly as anyone can hope for. I would confidently buy a knife from japanesechefsknife.com anytime. As for the blade, to each his own. This may not be for those that prefer a bit of weight on a robust blade but I love it. The KS slicer is light, agile and refined with an inspiring clarity from its elegance. Very good fit and finish. Pleased that the package includes a saya; saved me the trouble of having to procure or make one.

Austria Austria
I recommend this product
Very good Slicer!

Wow. When it arrived, I was blown away by it. So lightweight, so thin ... so beautiful! BUT: Before buying, decide, which size/length you need! I went for the 270mm version - because - why not? But you need the kitchen for it! I have to be careful, not to hit the wall with the tip... In the meantime, I also bought a 240mm Slicer, which fits my needs better. Still - it is a great knife and highly recommended!

JapaneseChefsKnife.Com Masamoto KS Series Hon Kasumi White Steel No.2 Wa Slicer (240mm and 270mm, 2 sizes) Review
Jacob T.
United States United States
I recommend this product
Five stars

Amazing superb quality knife. Easy to handle, and it brings joy to our cuisine. A truly FIVE STARS knife.

Chuck Y.
I recommend this product
Masamoto KS Series Hon Kasumi White Steel No.2 Wa Slicer 270mm

I own a lot of slicer from many different brands However with narrow 270mm with very thin body truly work as slicer and tremendous sharp edges does help when carving or slicing effortless. I cook a lot with slicer due to versatility, I recommend this knife to some one who does a lot of precious work... And my wrist can take break while doing so.

Alexander T.
United States United States
I recommend this product
I love this knife

Razor sharp & lightweight it slices fish effortlessly I am lucky to have Masamoto KS knives in my collection Thank you Koki & JCK.com!

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