Aoto Whetstone for Edge Pro - Gritomatic

Aoto Whetstone for Edge Pro

For Hapstone and Edge Pro knife sharpeners (Edge Pro format)
$35.60 USD 📊 Grit Chart


Aoto Whetstones are used for fine sharpening on Hapstone or Edge Pro sharpeners. Estimated grit for Aoto is approximately 2000-3000 JIS. Aoto stones are mounted on high quality aluminum blanks.

Aoto (青砥) Whetstone is mined in Kameoka, Kyoto in Japan.

Historically Aoto was the most common whetstone in Japan to sharpen kitchen knives.


  • Product size: 160 x 25 x 9 mm (6" x 1" x ⅓")
  • Working surface: 150 x 25 x 6 mm (6" x 1" x ¼")
  • Weight: 100 g (3.5 oz)
  • Abrasive: Silica stone
  • Extra materials: Aluminum Blank, 3M PSA

How to use

Aoto Whetstones should be used with water. Soak Aoto in the water for 2 minutes before use. During the sharpening, slurry is released from the surface. It's not necessary to keep slurry on stone surface.

Aoto stones may have inclusions as minor defects.

Aoto stone does not require any preparations.

About Gritomatic

Gritomatic is not just an online shop. This private brand is a collection of high-quality, custom-made sharpening products. Gritomatic offers natural and synthetic stones, empty blanks and leather.

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Questions and answers

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