The Chosera stones do not soak up any water so the stones do not need to be sprinkled with water … So Chosera stones should NEVER be left to soak in water for a prolonged period of time! Average rating. I bought it as the highest stone in my beginner's system as recommended on Dutch Bushcrafters Knifes channel. Chosera is a high-end series from Naniwa made of aluminum oxide with the magnesia binder. The light and portable KME Sharpener already has several stone options, and it's only natural that high quality synthetic stones should also be made available. The Naniwa Professional-series is the improved version of the Naniwa Chosera Stones. You purchase round Naniwa Chosera sharpening stones at Knivesandtools We test all Naniwa sharpenig stones ourselves With a 30-day free return policy Knivesandtools.ie uses cookies and similar techniques to make sure we can help you even better. They recommend a 400 grit stone for profiling, a 1,000 and then this 3,000 grit for final polishing and refining. Naniwa has renewed the binding agent of the water stones. You purchase round Naniwa Chosera sharpening stones at Knivesandtools We test all Naniwa sharpenig stones ourselves With a 30-day free return policy Knivesandtools uses cookies and similar techniques to make sure we can help you even better. We are offering the full Chosera range, from 400 grit to 10K, along with the Naniwa 320 Pro, 600 Bubble Gum, 1K Chocolate Bar, 1K Goken Pro, and 4K Finisher. Naniwa Chosera, Super and Work stones have been replaced by the new and improved Professional, Speciality and Combination stones. It is unique that Naniwa itself takes care of the production of the binding agent. I bought this Naniwa Chosera stone as I've seen many excellent reviews and videos on YouTube which show it to be a highly regarded.