Naniwa Abrasives

Naniwa Professional Stones (formally known as Chosera) utilize Magnesia in their bonding agent; giving these stones a longer life and faster sharpening capabilities. These stones are ceramic and do not require soaking. Splash and go. Learn More

The Apex of Sharpening: Naniwa 1000 Professional Stone For the craftsman who understands that the edge is everything, there is the Naniwa 1000 Professional Stone. This is not merely a tool for sharpening; it is the heart of a precision sharpening system, revered globally by master chefs, woodworkers, and knife enthusiasts for delivering an unparalleled sharpening experience. At the 1000-grit level, it is the quintessential workhorse—aggressively re-establishing a flawless primary bevel on a dull blade while leaving a refined, toothy edge ready for the most demanding cuts. The soul of this stone lies in its advanced magnesia-bonding process. This proprietary method creates a supremely dense yet friable surface, packed with a higher concentration of premium abrasive. The result is a sharpening sensation that must be felt to be believed: a swift, almost effortless cutting action with a smooth, velvety feedback that communicates the state of the edge directly to your hands. As you work, it generates a rich, uniform slurry that aids in polishing the steel, creating the beautiful, hazy kasumi finish prized on high-end Japanese cutlery. This is more than a purchase; it's an investment in the art of sharpening. Choose the Naniwa Professional when you seek not just a sharp knife, but mastery over the edge itself. Learn More

Naniwa Professional Stones (formally known as Chosera) utilize Magnesia in their bonding agent; giving these stones a longer life and faster sharpening capabilities. These stones are ceramic and do not require soaking. Splash and go.

3000 Grit is great to use for finish sharpening.

Size: 8.25x2.75x0.8 in. (210x70x20mm) Learn More

Naniwa Professional Stones (formally known as Chosera) utilize Magnesia in their bonding agent; giving these stones a longer life and faster sharpening capabilities. These stones are ceramic and do not require soaking. Splash and go. Learn More

Master the Art of the Invisible Edge: The Naniwa 10,000 Grit Professional Series When a knife reaches the 10,000 grit level, it transcends mere sharpness and enters the realm of surgical precision. The Naniwa 10,000 Grit Professional Stone—formerly celebrated worldwide as the 'Chosera'—is engineered for the final, most critical stage of the sharpening process. This is the stone that transforms a sharp blade into a high-performance tool capable of effortless, friction-free slicing. What sets the Naniwa Professional Series apart is its sophisticated Magnesia-based bonding agent. Unlike traditional resin-bonded stones, Magnesia allows for a higher density of abrasive particles. This technical advantage results in two distinct benefits for the professional: a stone that stays flat for significantly longer and a vastly increased sharpening speed. Because the bond is so efficient, this stone does not require soaking. Simply splash the surface with water, and you are ready to refine your edge in seconds. This stone is much cleaner than your typical waterstone that requires soaking before use, so it's a great choice for use on-the-go or in spaces that need to remain tidy.  Designed specifically for high-carbon steels and traditional single-beveled Japanese knives like the Yanagiba or Usuba, the 10,000 grit surface produces a flawless mirror polish. It doesn't just sharpen; it refines the geometry of the edge to eliminate microscopic jaggedness. For the professional chef or dedicated enthusiast, this translates to cleaner cuts, better food presentation, and a blade that stays sharper for an extended period. The feedback from the stone is tactile and communicative, allowing you to feel the exact moment your bevel reaches perfection. Learn More

Size: (210x70x20 mm) (8.25x2.75x.80 in.)
This coarse stone is recommended for use in chip repair, flattening shinogi lines and things of this nature. As opposed to traditional waterstones in this grit range, this Naniwa 200 stays flat longer, and doesn't create excessive slurry. A favorite of mine for repair work. Learn More

Size: (210x70x20 mm) (8.25x2.75x.80 in.)
This coarse stone is recommended for use in chip repair, flattening shinogi lines and things of this nature. As opposed to traditional waterstones in this grit range, this Naniwa 400 stays flat longer, and doesn't create excessive slurry. A favorite of mine for repair work. Learn More

Naniwa Super Stones require no soaking, just a splash and go.
Whereas the 1000 grit is normally considered the starter stone for an undamaged knife, if you're doing a lot of sharpening and want to save time, the 800 is faster. You can then skip the 1000 and move directly to a 3000 grit. No need to soak the stone, just splash and go. Learn More

Size: (210x70x20 mm) (8.25x2.75x.80 in.)
Naniwa "Super Stones" require no soaking, just splash and go. The 1000 grit stone is used for establishing an edge on a dull knife. It will remove micro-pitting but any chips will require a more coarse stone. This is the average size used for sharpening a dull knife. For use on meats, you may want to continue sharpening with a higher grit but will work great on vegetables. Learn More