Naniwa P-310 Professional Stone #1000

by Naniwa


Naniwa P-310 Professional (Chosera) #1000 Stone has been one of the standards by which many other #1000 grit whetstones are compared. It is highly refined, and gives your knives a very clean edge. This whetstone is pleasurable to sharpen on, and feedback is immediate. The wear speed is just right, and does not load up very easily. Ryky considers it a fairly hard whetstone, but not as hard as a ceramic based whetstone.

Comparing it to Ryky's favorite Naniwa Pro 800:

The 800 is faster, more aggressive, and gives more immediate feedback. Those who are looking for absolute speed will enjoy the 800 more than this #1000.

This #1000 stone is more refined, slightly more forgiving, and easier to use and learn on, especially for beginners. Those who want to enjoy the sharpening process more, will likely prefer this #1000 over the 800.

Made in Japan


  • Origin: Osaka, Japan
  • Grit No.: #1000 WA
  • Type: Splash & Go
  • Dimension: 210 x 70 x 20mm (8.2 x 2.7 x 0.7")
  • Weight: 800g (28.2oz)
  • Abrasivewhite aluminium oxide 
  • Cohesive agent: magnesium-bound

How to use:

Do not soak this whetstone. Simply apply water on the surface when ready to use. Rinse and wipe dry with a hand towel when done, and allow air dry at room temp. Do not leave in water.

How to clean:

If the stone’s performance is slowing down, or seems to be diminishing, you can clean using a rust eraser,  nagura stone, dressing stone, or a flattening plate. Be sure to clean the entire surface of the whetstone when using any of these methods to ensure even wear of the whetstone’s surface.

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