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How to choose right whetstone

March 06, 2017 0 Comments

How to choose right whetstone

Preparation of the whetstone

The grade of a whetstone differs depending on the color.

The roughness of a whetstone is expressed by the numerical value of the grit size. The smaller the number, the rougher it is; the larger the number, the smoother the stone.
Generally, all you need is one medium whetstone.
Once you get used to it, you can add a finishing stone and a rough stone.
Natural whetstones, diamond whetstones, etc. are for intermediate and advanced users. Normally they are not used.

  • Rough whetstone: No.80 - 220: Used when repairing a cutting edge with large chips.
  • Medium whetstone: No.400 - 1500: Used it for everyday maintenance.
  • Fine whetstone: No.3000 or more: Used after grinding with a medium stone to further improve the sharpness. Because the grit is fine, you can sharpen the blade finely and increase the sharpness. You can also give the cutting edge a mirror-like finish.
  • Natural whetstone: Used if you are not satisfied with the finish of the fine whetstone and want to be able to cut even more. The price is also high, it may be broken because it is a natural whetstone. * Because it is natural, it cannot be exchanged even if it breaks.
  • Diamond whetstone: Material is very hard and can be kept very flat.


Before sharpening the kitchen knife, place the whetstone in water, and leave it until until no bubbles come out. It usually takes about 10 minutes.


The liquid is green because it contains antirust solution.
Ordinary water can be used with no problem.

If you keep using the whetstone, the middle of the surface will become indented. In such a case, please make the surface flat before you start using it. You can easily make the surface flat by turning it face down, etc. When turning it over, chamfer the corners to avoid injury.

When you can't turn it over, it is possible to flatten the surface simply by rubbing with asphalt. Apply plenty of water and rub it as if drawing a circle. You can easily repair the face. There will be little scratches on the whetstone, but they will clear up as you use the stone.

Preparing the stone holder

Please fix the whetstone firmly so that it won't move, rattle or slip.
Take care, as it can be very dangerous if it moves.
If it rattles, hold it in place by putting a wet towel under the whetstone.
We also sell stone holders.


How to hold a kitchen knife

With the blade of the kitchen knife facing downwards, the right side is called the "front", the left side is called the "back". * If you are left-handed, it is the opposite and all subsequent explanations are reversed. On the right hand gently grip the handle with the middle finger, ring finger and little finger, place the thumb on the heel (chin) of the front side of the blade, and the index finger along the spine. The thumb, index finger, and wrist are 3 firmly fixed points. With the index finger, middle finger, and ring finger of the left hand, firmly hold down the part you want to sharpen. The little finger will tend to come down, but because there is the danger of injury, keep it taut.

(1) Hold with 3 fingers
(2) Place your thumb
(3) Position the index finger along the spine