There are regular sharpening stones and then there are sharpening stones that become your most valued possessions. The Naniwa Professional is one of those products. Everything about them was designed for the most discriminating user. An experienced user is looking for a stone that not only sharpens well, but sharpens quickly. The Naniwa Professional is so consistent and quick to sharpen that it is truly a pleasure to use.

Generously Sized

The Naniwa Professional Stones we carry are quite generously sized. The actual dimensions are 210 x 70 x 20mm. This roughly translates to 8 1/4" long x 2 3/4" wide x 3/4" thick. This size is just about perfect for most knives and tools. The thickness of the single grit stone will last countless sharpening sessions.

10,000 Grit

If your budget allows, the 10,000 grit Professional is a really great polishing stone for any edge. This high-end stone will quickly become a prized possession in the hands of an experienced sharpener. You'll truly appreciate the consistent feel and fast-cutting that all Professional stones offer.

Magnesia Bonding

What makes the Professional different from other water stones is the bonding. They call it Magnesia Bonding in comparison to their Resin bonding on the Naniwa Advance Superstone series. One of the main features of this process is greater density and consistency of finely graded abrasive particles. This gives the stone the fastest sharpening capability among our water stones. Experienced users can really feel a difference with these stones.

Splash and Go

Soaking the Professional stones is not recommended. A quick in and out dunk in water, or spraying them several times over the coarse of a minute or so is all that's required. We do recommend keeping a spray bottle handy to keep the stones wet while sharpening.

Some Care Required

Like many products designed for the high-end user, the Naniwa Professional Stones require more care than your average stone. Unlike some water stones, these are not to be left in water, leaving them in water will affect the bonding. When you are done, just let them air dry. Don’t try to speed up the drying process by exposing them to heat, just let them air dry so they can dry evenly. Store the stones only after they are completely dry. If this extra care is too much for you, we suggest you choose a different type of stone.

Secure Packaging

Each Naniwa Professional Stone is wrapped with cushioning inside the box to ensure that the stone arrived in perfect condition. When purchased from us we also take the extra step to give it our "royal treatment" in packaging. These stones are valuable and we want to ensure that every stone arrives at your location in the same condition it was in when it left the factory.

Made in Japan.

Q. Has this stone had other names?

A. Yes. This stone has previously gone by a few names over the years. It was first called the Chosera, then the Professional (this stone), it is now called the Chocera.

Discontinued Naniwa Packaging

Naniwa Professional Stone 10000 Grit Previous Packaging

Naniwa Diamond Stone Previous Packaging

Naniwa Traditional Water Stone Previous Packaging