Sharpening Stones

Designed to remove rust from carbon steel knives and tools. Knife Merchant Tip: Rust erasers are generally used dry, but for heavily rusted knives, adding a couple drops of tsubaki or mineral oil speeds up your work and creates a smoother finish Learn More

The Naniwa Stone Holder secures your stone while sharpening or flattening. It has good traction with the rubber mounts and sufficient weight to keep from moving around. Holds stones from 5.5 to 9 inches in length.
This is good quality stainless steel that won't rust out on you. We tested one leaving it in the water overnight and pulling it out in the daytime as we used it. Other models rusted on us within days. The Naniwa never rusted after two months, and the screw downs still move smoothly. Now, these shouldn't be left in the water and we're not suggesting that. But if it gets accidentally left in the soak tank, it's not going to be a problem. Learn More

Achieve the Legendary 'Scary Sharp' Mirror Edge Sharpening is a journey that begins with repair and ends with refinement. For those who demand more than just a functional edge, the Naniwa 10,000 Grit Ceramic Super Stone represents the pinnacle of Japanese abrasive technology. Unlike lower grits that remove steel to create a new edge, this ultra-fine 10,000 grit stone is a specialized tool designed to polish and temper. At this microscopic level, you are no longer 'grinding'; you are aligning the steel's molecular structure and removing the invisible burrs that prevent a knife from gliding through delicate proteins. The result is a 'mirror edge'—an aesthetic masterpiece that provides a frictionless cutting experience. Crafted using Naniwa’s proprietary resin-bonding process, this stone offers a unique tactile feedback often described as 'creamy' by professional sharpeners. This ensures you can feel the angle of your blade across the surface, providing more control than harder, glass-backed alternatives. Whether you are maintaining a high-carbon Honyaki or a modern VG-10 blade, this stone delivers the final, definitive touch of sharpness. 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

The Naniwa (Lobster Brand) 1000 grit waterstone is the most commonly used grit waterstone. This stone is intended for daily maintenance and establishing an edge on a dull knife. Needs to be soaked in water (usually until the bubbles stop) before use. Learn More

Unlock Flawless Edges with the Ultimate Sharpening Surface: The Naniwa Diamond Stone 1000 Step up to the pinnacle of sharpening technology with the Naniwa 1000 Grit Diamond Sharpening Stone. Precision-engineered in Japan for those who refuse to compromise on sharpness, this stone is the definitive tool for maintaining and restoring a perfect, razor-sharp edge. The 1000 grit is the ideal "workhorse" grade, expertly balanced to quickly erase dullness and establish a refined edge that is ready for use or further polishing. At its core lies a perfectly flat steel plate coated with high-density monocrystalline diamonds—the hardest and most durable abrasive available. This advanced construction gives it unparalleled cutting speed, allowing you to sharpen even the most challenging modern "super steels" (like S90V, ZDP-189, and Maxamet) and ceramics with remarkable ease. Unlike traditional whetstones, the Naniwa Diamond Stone will never dish, warp, or require flattening. It guarantees a perfectly true surface for the entire life of the stone, ensuring every pass contributes to a consistent, flawless bevel. For the discerning user, this isn't just a sharpener; it's a permanent upgrade to your entire sharpening system. 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

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

Naniwa’s Traditional Water Stones are specially designed for sharpening hard steels commonly found in woodworking tools and select specialty knives. This Hard Steel series runs parallel to Naniwa’s Standard Traditional Stones but is engineered for enhanced performance on tough steels. Featuring a harder binder, these stones provide a more aggressive sharpening action while minimizing wear, making them ideal for the unique demands of hard steel applications. 1000 Grit: This stone is a very popular grit choice because it starts to refine the edge. This stone is an excellent follow-up after using the 220 stone. If your edge isn't very worn, you don't need to start any coarser than this. Learn More