A nagura is a small conditioning stone used to raise a slurry on the surface of a larger sharpening stone. Rubbing it across the stone releases fine abrasive particles that mix with water to improve cutting speed, refresh the stone surface, and produce a smoother, more consistent finish on the edge. The Irodori line from Naniwa is the most practically useful nagura range available: each stone is manufactured to a specific stated grit, which means you can match the nagura to the stone you are working on and produce a slurry of known particle size. Coarser grits break the surface faster and generate slurry quickly; finer grits are used for polishing and refinement on finishing stones. Each Irodori stone measures 60mm x 30mm x 20mm - compact enough to store with the stone it accompanies. Made in Japan.
The 800-grit Irodori is well matched to stones in the 800 to 1000 range - the Naniwa Super Stone 1K, Shapton Pro 1K, Cerax 1K, and similar medium stones. At this grit level the nagura generates a slurry that keeps the stone cutting actively and prevents glazing during extended sharpening sessions. It also serves as a light surface refresh between uses when you want to revive the cutting feel without full flattening.
Care Instructions: Splash both the nagura and the sharpening stone with water before use. Rub the nagura gently across the stone surface to raise slurry, then sharpen as normal. Rinse after use and allow to air dry completely. Do not soak. Store in a dry location away from freezing temperatures.
The 800-grit Irodori is well matched to stones in the 800 to 1000 range - the Naniwa Super Stone 1K, Shapton Pro 1K, Cerax 1K, and similar medium stones. At this grit level the nagura generates a slurry that keeps the stone cutting actively and prevents glazing during extended sharpening sessions. It also serves as a light surface refresh between uses when you want to revive the cutting feel without full flattening.
Care Instructions: Splash both the nagura and the sharpening stone with water before use. Rub the nagura gently across the stone surface to raise slurry, then sharpen as normal. Rinse after use and allow to air dry completely. Do not soak. Store in a dry location away from freezing temperatures.
- Brand: Naniwa
- Line: Irodori
- Grit: 800
- Dimensions: 60mm x 30mm x 20mm
- Origin: Japan
