How to Sharpen a Sushi Knife

Updated On: July 10, 2021
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I always thought it’s challenging for me to sharpen a sushi knife in a proper way. But when I started researching online, I got many different ways to get the job done.

But unfortunately, most of them are time-consuming, and some of them might cost a pretty penny! Are you looking for a solution?

Alright! So today, I’ll only talk about how to sharpen a sushi knife with ease, including what things you need to have and what types of grits are ideal for sharpening.

Trust me, the things you need to collect aren’t costly and can be found anywhere.

Besides, if you apply the technique that I have mentioned below, it will be possible to complete the whole task within just around 30-45 minutes!

The Easiest Way of Sharpening a Sushi Knife – Step by Step Guide

Right now, I’ll teach you how you can sharpen your favorite sushi knife with ease and that too in the best way possible!

RELATED: Best Sushi Knife

Essential Things Required:

  • Whetstone
  • Flattening stone
  • Pencil
  • Water

Step 1: Preparing the Water Stone (Whetstone)

First off, put the water stone straight away in the water for up to 20 minutes. If you notice the air bubbles aren’t visible in the whetstone, it’s a clear sign that the stone has absorbed a sufficient amount of water.

Be sure the stone you use is flat as a pancake! The one which is inappropriately shaped might spoil the whole attractiveness of your high-end knife.

If you notice the whetstone is uneven, get your hands on a flattening stone. A pencil comes in handy in order to draw some marks on that stone.

Make sure you draw a grid line and feel free to rub the water stone immediately against the flattening stone in a “back and forth” manner.

It would be best if you kept on rubbing till the marks of the pencil go out. If you see all the marks are gone, it’s a sign that your water stone has become completely flat.

Pro Tip: Ensure to get a high-grit whetstone if you’re hungry for an expert-looking polishing and finishing.

Step 2: Time for Sharpening!

Keep the water stone on a non-slippery dry surface, or you can also get a whetstone holder additionally. A low-grit water stone has to be used first in terms of sharpening your sushi knife.

Well, once you set up the whetstone perfectly, start moving your blade in a “back and forth” manner. Try to perform the task as slowly as possible with light pressure. Ensure the angle of the blade is between 10 – 15 degrees.

Don’t forget to rub all the sides against that stone two times, and at least for 3-5 minutes.

Note: Since you’ve sharpened your sushi knife, don’t make a mistake by pressing it against stone; instead, you should glide as gently as possible over it.

Step 3: Polishing the Sushi Knife

When it comes to polishing your sushi knife, I’d suggest utilizing the high grit instead of the low one of your water stone.

Make sure the stone is wet enough, and don’t forget to follow the same angle that I’ve mentioned earlier. (10-15 degrees).

Once you’ve successfully polished your sushi knife, rinse the water stone straight away using lukewarm water. Next, wipe the residue off, and guess what?

From now on, you’re ready to use your razor-sharp sushi knife!

Step 4: Let’s Test the Sharpness!

Feel free to test the sharpness of your sushi knife to make sure you’ve performed your job successfully.

If you see you’re smoothly able to slice up a single piece of paper or a wet sponge, then put a smile on your face as the blade has become RAZOR SHARP!

Another great way to check the sharpness out of your blade is to chop up tomatoes. This form of testing will be kind of similar to my previous technique.

That means if you can slice without even touching the tomatoes, it’s a clear sign that you’ve made the blade of your sushi knife sharp enough.


Wrapping Up!

Stay away from preparing the yummy dish “sushi” with a piece of a blunt knife by learning the proper technique of how to sharpen a sushi knife. Here, I’ve shown you the most basic way of sharpening your knife manually!

You can also go with an electric knife sharpener to make your whole job easier and a lot more comfortable, but that might cost a small fortune compared to using the whetstone technique.

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