Miyagoshi Rouran #220 ceramic stone

Miyagoshi Rouran 220 – Pre - Sharpening Stone (#220)

Miyagoshi Seito (宮越製陶) is a small Japanese manufacturer based in Kyoto, specializing in the production of high-quality sharpening stones. The Rouran 220 model is a thick, abrasive stone designed for intensive blade treatment – especially for regenerating severely dulled edges or removing chips.

It is produced in a controlled sintering process, in which the abrasive is bound with a durable binder, fired at high temperature. As a result, the stone offers high abrasive aggression, while maintaining dimensional stability and high wear resistance.

Application of #220 grit

220 grit is the typical choice for pre-sharpening:

• quick removal of material from the blade,
  
• correction of nicks and damage to the cutting edge,
  
• restoring the blade to a usable condition before further smoothing.
  

Ideal for kitchen knives, workshop tools, and steel blades that require a thorough reconstruction of the cutting geometry.

Characteristic features:

• handcrafted in Kyoto – full quality control,
  
• fast and effective work – very good abrasive aggression,
  
• durable, vitrified structure – the stone does not collapse and wears slowly,
  
• large working size – comfortable work even with larger knives,
  
• pleasant to use pink color – better visibility of work marks.

Specifications:

• Brand: Miyagoshi Seito (宮越製陶)
  
• Product name: Miyagoshi Rouran 220
  
• Type: preliminary sharpening stone (荒砥石)
  
• Grit: #220
  
• Application: removing chips, dull blades, edge correction
  
• Color: pink
  
• Abrasive: aluminum oxide (Al₂O₃)
  
• Binder: high-temperature sintered mineral
  
• Production method: pressure molding, fired at ~1300°C, porous structure
  
• Dimensions: approx. 205 × 65 × 32 mm
  
• Weight: approx. 1000–1100 g
  
• Origin (Made in): Kyoto, Japan