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.

One of the best and easiest to using sharpening stones i have used. i have a cheap amazon set with 8 different grits that i purchased for around $40 total and i thought that set was good and then i upgraded to the Naniwa Diamond stone which was very high end but this Chosera is so much easier to work with and it does not take much effort to get a knife back to factory and/or better condition. The 400 grit is not as rough as i expected and it does an amazing job just after about 4-10 passes and the working area is much larger than i expected so this will be good for any job. I pair this with the Chosera 2000 grit and these 2 together are a game changer. so if your in for quality sharpening, you cant go wrong here and i would recommend these over their diamond edition due to ease of use given that i am not that skilled at using whetstones.

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.

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 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 stone is quality no question about it. If this is your only stone then you will definitely get the job done with it and will bring knives to decent sharpness without moving up grit levels. But if this is just the Coarse Stone in your set then you may want something with some more bite. The stone just feels a little soft and it takes some more passes to really bring back a dull blade to life. Perhaps something more abrasive would be better in a set of stones than this one. If I had to go back I think I would pair a 320 grit stone with the Chosera 1000 and a polishing stone.

I really like this #400 stone just like in the videos the experts have online this stone does a quick job on knives with really hard to sharpen stainless steel. It really starts showing that it's removing steel as soon as you start using it, just splash water on it's surface and start sharping your blade, you will quickly notice it is working well. Stone comes with a good sized Nagura stone for cleaning of the stone and making sharping mud. One thing i do wish is that Naniwa did not glue their stone to the plastic base, but this is how they Mfg. it, it's not a problem and this stone is really thick so having to turn it over in a life time will not be needed. I am sure you will agree after using it that it's a quality water stone.

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.

Come al solito consegna puntuale e pietra apparenemente di buona qualità

Estoy esperando la última piedra que ordené ya tengo grano 400, 600, 1000 y 5000 me falta por recibir la piedra grano 3000, acabo de usar todas las piedras para afilar un Muela Podenquero de doble filo que me llevo al monte cuando vamos de cacería del Wild Boar en el sur de Texas y les aseguro que quedó como un bisturí, también afile un Bowie Cudeman e igualmente otro bisturí, afile por diversión un PUKKO Finlandés que venía con mucho filo y me impresionó que en un medidor de filos que tiene un amigo fabricante de cuchillos marco 120 o sea mejor que una navaja barbera y también pulí el filo de un Fallkniven S1 de acero Lam Coos y es otro bisturí, si tienes filos de calidad no escatimes en herramientas de afilado a la larga te salen más baratas que comprar piedras corrientes, de hecho tengo 6 Katanas que únicamente pulo con la piedra 5,000 de Chosera y después uso aceite de Camelia para proteger el acero, todo lo encuentras en Amazon a buen precio, se las recomiendo ampliamente

Best!

Amazing

Simplesmente maravilhosa, em momento algum a faca perde contato com a pedra, vale cada centavo.