Naniwa Chosera Whetstone SS-400 Grit 400

I’ve worked in the food industry for several years and have spent a long time studying and experimenting with knife sharpening. From my experience, achieving a truly sharp and durable edge comes down to three things: good steel, high-quality stones, and proper technique. The Naniwa Chosera #400 really impressed me. It offers strong abrasive power with a perfect balance of hardness. The tactile feel is smooth and consistent — it cuts quickly without wearing down too fast or clogging with metal. There’s no need for a Nagura stone, which is a big plus. For bevel setting or repairing damaged edges, this is the best coarse stone I’ve used. You won’t need to look for alternatives. For flattening, I use 3M metal sandpaper (grit 120) on a flat ceramic or marble surface. It works surprisingly well and is easier to manage than diamond plates or large flatteners. One useful tip: I recommend removing the Chosera from its plastic base. When left attached, it doesn’t dry evenly and can develop cracks over time. The #400 absorbs quite a bit of water compared to finer stones, so even drying is important. To detach it safely, use three wedges of soft wood — never metal tools, as they can chip the stone. Overall, the Naniwa Chosera #400 is an exceptional coarse stone that performs exactly as a professional would expect. Highly recommended for anyone serious about sharpening.

The best stone for knives ever made. It's the best value, I would get an 800 grit too but yeah, you can't beat the value or the quality. You can spend more money sure but the grind patterns will marginally improve. The grind pattern is confirmed under a microscope. Back to this westons For the wet stone, please use this with a metal over the sink holder. This way you can run water over the wet stone which helps keep it clean, gunk-free and you avoid the long soak times. Remember to get a leveling stone, A cheap one will do, $15 bucks. If you need to know more just leave a review asking for help or a guide and i will answer your questions. This is the best brand. Also learning to hit the same angle ever time is the most important factor of all. It's hard and takes practice but there are good guides you can use and youtube videos to help with that. But yeah Again this is the best brand in the world. You can look at the grind patterns on the knives under an electron microscope to confirm how good this brand is. Scientist have done this and the grind is amazing some of the best out there. This rivals $400 stones! I would not use this to Sharpen steals like S90V, Use diamond plates for that and don't press down too hard on the diamond, you will dislodge diamonds.

This stone knife sharpener build quality is solid, and the surface gives a smooth, consistent sharpening experience. Within just a few passes you can feel the tactile feedback

The Chosera line of stones are my favorite. I sharpen knives as a side job and these are my go to stones with expensive kitchen knives or knives with super steels or expensive knives in general that I wish to give the best treatment. The stones are splash and go, DO NOT SOAK, and are extremely hard and slow wearing while cutting metal very quickly. Smoothest tactile feel of any water stone I've ever used. Just an absolute joy to use. Like ever other stone in this line, it polishes above it's grit level but still cuts as fast as the stated grit. In a progression, I usually use this as the first stone for very dull blades or blades that need a chip repaired or need to be reprofiled, etc before stepping up to a 1000. I've never found the need to start with a coarser diamond plate either, this stone makes quick work of even the hardest metals with large carbides. This is the older version that is 25mm thick and comes with an attached base and nagura (which I never use but, I know some people like them). The newer stones are branded "Naniwa Professional" they are 5mm thinner and come without the base for the same price but are supposedly harder and slower wearing but I have not noticed any performance differences between the two versions so, definitely go with the older Chosera version as long as they're available.

This stone works well for roughing in an edge. I have this one (400), the 800, and the 3000. Lastly, I use a leather strop (home made) with white rouge for the finish. Razor sharp. Mirror finish. This is the best sharpening setup I've owned. I just went through my old chisels and have them gleaming. They're sharper than they've ever been. (My Lie-Nielson chisels only needed the strop to bring them back.) I used the Veritas chisel guide to re-establish the bevel and micro bevel on each of the old chisels. For fun, I sharpened the dullest stainless steel kitchen knife my wife had. It's now almost as sharp as the Shun Classic knife set, though the bevel is steeper. It won't keep the edge like the rh61 Shun knives, but it was fun to do. It's a perfect knife for boning now. This 400 grit stone cut quickly to establish an initial edge on an extremely dull knife. I'm using an old DMT DuoSharp (600/1200) diamond sharpener to keep the stones flat. It works well for that, but seems to cut metal far slower than the stones when used directly as a sharpener.

Great stone for reprinting profiles or fixing chips. Cuts reasonably fast and doesn't dish out. Splash and go is nice.

Llegó muy bien protegida y sin ningún tipo de avería. La piedra puede con casi todo desde cuchillos de cocina, hasta herramientas como cinceles y formones apenas se nota un ligero desgaste. Es muy bonita compraré otra solo para tenerla en exhibición.

Amazing

Great price and services from Amazon. It took me many years to cross over to Amazon after being an avid eBay shopper and was pleasantly surprised as to the service and the way I was treated. Amazon kept me briefed during the entire process and delivery. Same day delivery was awesome. Stone did not disappoint one bit when I got to to use it. Great Range of stones and it cuts the metal very, very well. Most disappointing thing was I was at home when the delivery guy came and the front door was open. He didn't even knock as he was to busy on the phone talking to a friend and he just threw the parcel onto the front step and just walked off. Being a Whetstone it was quite upsetting to see and hear my goods being tossed around that way. After such a great experience with the purchase and Amazon service the end was marred by the driver and his attitude. Hope he wakes up and pulls his socks up 5 Stars for the Great Quality Stone and Amazon Service but NO Stars for the driver

The Chosera 400 is fantastic all around, I love it's results: On certain alloys it can cut pretty quick on minor repairs/setting new bevels/thinning. It really isn't a heavy lifting COARSE stone for serious chip repairs major thinning - on certain metal alloys this stone can struggle to repair/rebevel. For very dull knives, this ceramic stone is perfect. It’ll give you a great edge on something beaten up / used and abused, but for big repairs, go to something lower grit, or something corundum or aluminum oxide. I'd even argue this one would fit better in the 'medium' stone category. It’s a softer ceramic stone that it builds up slurry/mud pretty quick and, if used correctly, can actually achieve a decent hair popping finish all by itself. It’s a perfect prep stone for any stone in the 800-3k range. It does dish/wear a little quicker than I'd like (needing to be flattened a fair bit), but honestly, I can say that could be my fault for using it on tougher tasks than I believe it was made for. 10/10, 5/5 stars, highly recommended!

Deze steen is super slecht verpakt. Gewoon eigen verpakking gebruikt van de steen zelf. Geen externe doos met bubble wraps ofzo. De steen is gebroken in tweeën. Ik kan het nog wel gebruiken, daar niet van, maar ik raad het af om deze hier te bestellen