JapaneseChefsKnife.Com (JCK, Established in 2003) is the direct internet sales division of The Kencrest Corporation. We supply a wide range of top quality Japanese Chef's knives at lower than Japanese Retail Prices direct from Seki City; the Japanese cutlery capital where fine knives are produced using over 800 years of Samurai sword-making tradition and history.
1. Start off with the rough grit. If you have a particularly dull blade, start off with the rough grit side of your sharpening stone. How do you tell which side is the rough grit? Sometimes you can tell by sight. If you can’t do that, do a thumbnail test. Scratch the surface with your thumbnail and whichever side feels rougher, that’s the side you want to start off with. Also, rough grits tend to be more porous than finer grits. So if you put water on one side and the stone really drinks it up, chances are it’s the rough grit.
In most cases a sharpening stone will be a combination of sharpening grains and a binding agent. However, in case of a Ardennes Coticule it is a completely natural product. The grains have cutting edges which enables them to sharpen your knife. As soon as a sharpening stone is used little pieces of the grains break off, revealing a new cut ing edge. The higher the number, the finer the grain. Stones with coarse grains (up to grain 400) can be used to shape the blade of a blunt knife. You can subsequently take care of the fine finish with a stone with a smaller grain.
Sharpal 102N 5-in-1 Knife and Hook Sharpener features Sharpal 102N 5-in-1 Knife and Hook Sharpener features pre-set crossed carbides for quick edge setting and ceramic stones for fine honing. Multi-groove sharpening stone is designed to sharpen fishhooks of various sizes. It comes with rubber over-molded body and feet for secure and comfortable grip. Moreover integrated compass built-in rust-proof ...  More + Product Details Close
Works well. Just got it today, sharpened two pocket knives, one a 8Cr13MoV Chinese steel, the other s30v American steel The stone made short work of both steels (which were pretty sharp already). But notably was able to make the s30v hair shaving sharp easily, something I've had trouble with. Inexpensive and useful, I love this stone. It's not the Ninja sharp 8000+ grits that you can find, but for pocket knives and EDC, it's perfect and inexpensive. Get One!!!!!!!!!!!!

A base for your whetstone should be included in any model you purchase. Considering you are using your whetstone after its been submerged in water; the stone tends to slide on most surfaces when you sharpen. The base, usually a rubber silicone anchor, will ensure that the stone does not move around. A slippery stone can be a hazardous situation. The goal is safety, however, some companies will take liberties to present a decorative base and forgo the safer option.

Whetstones may be natural or artificial stones. Artificial stones usually come in the form of a bonded abrasive composed of a ceramic such as silicon carbide (carborundum) or of aluminium oxide (corundum). Bonded abrasives provide a faster cutting action than natural stones. They are commonly available as a double-sided block with a coarse grit on one side and a fine grit on the other enabling one stone to satisfy the basic requirements of sharpening. Some shapes are designed for specific purposes such as sharpening scythes, drills or serrations.[9]

This is a hard review to write because while the stone is great and comes perfectly flat it's too darn small. My problem is I bought one of these over fifteen years ago and after a move it suffered two cracks across the face making it unusable. That stone is about 3" x 8 1/4" x 3/4" . This new version is about 2" x 7" x 1/2". It's practically impossible to polish a knife set from a big #7 plane let alone a #4 plane. I feel cramped even using it for chisels! The thickness doesn't really bother me even though my thicker stone cracked, with reasonable care I don't expect this one to crack. So although I love the actual stone I wish they still made my old stone. I guess I should have measured my original one and then compared the description but I assumed they would be the same. So because of that I took off one star but since there's nothing wrong with the actual stone I wanted to give it three stars based on the small size but couldn't.
The whetstone, sometimes referred to as a honestone, was a common object in medieval London, and it was used primarily for sharpening knives and other blades. This particular whetstone is made of stone that is 145 millimeters in length and 11 millimeters wide. The object is wider near the top and narrows towards the base with a notch at its wider end. It should be noted that whetstones are usually uniform in width at their creation, but become weathered due to use. Whetstones, commonly used as they were, were easily worn down and replaced; this one was brought by merchants to be sold in London markets and was used to the point where its bottom side became several millimeters smaller than its top side. The stone used to make such an object was typically Norwegian Ragstone, which was shipped to London. The type of stone most ideal for whetstone production tended to be hard schist. These types of whetstones were created by specifically using stone that was taken from sections of quarries purposed for the production of whetstones. In general, quarries had access to different types of stone depending on their location, and these stones could be used for different items, mostly depending on properties such as hardness and grains present in the rock.
Once the burr is removed, it's time to test the sharpness with paper. Hold a piece of newspaper at about 45°, with a bit of tension, and slash lightly with each point of the blade. If it cuts through easily, your knife's sharp. Warner speedily lacerated his newspaper, but I of course struggled. There is an element of technique involved, he reassured me. 
Novaculite is a type of stone that can only be found in North America and in a limited geographical region of Texas, Oklahoma and Arkansas. The novacula stone formation in the Ouachitas of Central Arkansas is geologically considered, without a doubt, to be the purest and finest quality.  Its extremely high-purity silica content exceeds 99 percent. This Ouachita Mountain Novaculite is the only Novaculite we use in producing the FINEST whetstone sharpeners you can buy.
Prep your stone: To adequately lubricate the stone, rough and medium whetstones should be soaked in water for 20 to 30 minutes, or until air bubbles stop rising, before use. Finishing stones should not be soaked, as they are prone to cracking. Instead, sluice a fine-grit stone with water and use a nagura, or dressing stone, to create a slurry of silt for improved polishing. Once ready, place a sharpening base on a flat surface and fit the whetstone on top of it.
After several uses the Kamikoto is proving itself to be better than expected. As a professional I use different knives all the time and in fact have several thousand dollars worth of very fine blades of various manufacture. As it stands right now, if I could pick only one knife from all of them, I would take the Kamikoto. Fish, vegetables, raw meat, cooked meat, it handles them all very well and is a pleasure to use because of excellent balance and weight. And the edge… magnificent. Care and careful sharpening will be important, but then it always is with the finest of things. I would unhesitatingly recommend this product to people who appreciate the best. This is not a knife for fools or clumsy people. Buy, use, enjoy. And to the people at Kamikoto; “Thank You for making such a beautiful thing!”