Products Tested & Guaranteed Free Product Support Same Day Shipping and Free Shipping on Orders Over $99 Products Tested & Guaranteed Free Product Support Same Day Shipping and Free Shipping on Orders Over $99
Naniwa Aotoishi Sharpening Stone

Naniwa Aotoishi Sharpening Stone

Item # Aotoishi
Price: $74.99
In Stock - Ships Today

Get our FREE Sharpening Resource Guide with any $50 order.
  • Green Brick Of Joy
  • 2000 Grit
  • Over 2" Thick!


The Green Brick of Joy

The Aotoishi stone from Naniwa has developed a dedicated following among knife sharpeners. The large, brick-like shape ensures a long lasting stone and its efficient sharpening has made it a favorite of many. The name Aotoishi, printed in characters on the stone, refers to its color and identifies it as a whetstone. Among its many fans though, the Aotoishi is often simply called "The Green Brick of Joy".

General Purpose Stone

The Aotoishi is 2000 grit, making it a jack-of-all-trades stone. It is coarse enough to put an edge back on a knife that is only a bit dull, and yet fine enough to leave a good cutting edge as well. Whether you are looking for a single stone to maintain your knives, or for a middle grit stone to add to your sharpening tool kit, the Aotoishi has it covered.

2 1/2 Times Thicker

Like other Naniwa stones, the Aotoishi has a foot print of 8-1/4" x 2-3/4" (210mm x 70mm). But unlike all the others, the Aotoishi is 2-1/8" thick (55mm). That's more than 2-1/2 times thicker than the 3/4" (20mm) stones. That extra thickness ensures that this work horse of a stone will be around for a very long time indeed.

A Joy to Use

It's easy to see how the Aotoishi got its nickname, it really is enjoyable to use. It should be soaked prior to use, but it is not as thirsty as many soaking stones and doesn't have to be immersed long. 5 minutes or so is generally plenty to get it saturated and ready to go. This stone has a not-too-hard, not-too-soft feel that gives good feedback when sharpening, and forms a slurry quickly during use. It's standard footprint fits in a stone holder well, but it is massive enough to stay put on its own too, and the extra height provides all the knuckle clearance you could ask for.

Q. Which series of Naniwa stones does the Aotoishi belong to?

A. The Aotoishi is unique and belongs to a series of its own. A series with a single stone.

Additional Categories

Need more information?

Call a Product Specialist

Monday through Friday, 8 a.m. - 4:30 p.m.
Phone US: 1-800-351-8234
Outside US: +1-608-203-1129

Email a Product Specialist
Emails are answered Monday through Friday
I recently placed my first order after finding you on the web while looking for grinding wheels. I am a customer for life. Here's why. My first order was a simple white grinding wheel for a "normal joe's shop". When I received the wrong wheel (150 grit instead of the ordered 100 grit) I called and without hesitation or the 3rd degree another wheel was sent off. No questioning of my integrity, intelligence or honor. Simply "I am sorry, we'll send the correct wheel off immediately..." The right thing was done by a neat guy. I was treated like an adult. Unbelievable in this day and age...proper...and priceless. Price, performance, responsiveness and customer service par excel-lance. 6-Stars! All my sharpening orders, albeit small shop orders, will now be with you. Promote you I will.
Greg T, Iowa