Miyagoshi Rouran #220 Ceramic Whetstone

Miyagoshi Rouran 220 – Preliminary Sharpening Stone (#220)

Miyagoshi Seito (宮越製陶) is a small Japanese workshop from Kyoto specializing in the production of high-quality whetstones. The Rouran 220 model is a coarse abrasive stone, intended for intensive blade work—especially for restoring severely dulled edges or removing chips.

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

Application of #220 grit

The 220 grit is a typical choice for preliminary sharpening:

• for fast material removal from the blade,
• for correcting chips and damage to the cutting edge,
• for restoring the blade to a usable condition before further sharpening.

It’s ideal for kitchen knives, workshop tools, and steel blades that require a complete reconstruction of the cutting geometry.

Key Features:

• artisanal production in Kyoto—full quality control,
• fast and effective work—very good abrasive aggression,
• durable, vitrified structure—the stone wears down slowly,
• large working size—convenient for working with larger knives as well,
• pleasant-to-use pink coloring—better visibility of work marks.

Technical Data:

• 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: mineral binder fired at high temperature
• Production method: pressure molding, firing at ~1300°C, porous structure
• Dimensions: approx. 205 × 65 × 32 mm
• Weight: approx. 1000–1100 g
• Place of production: Kyoto, Japan