Miyagoshi Ajisai #1200 ceramic stone

Miyagoshi Ajisai 1200 – Sharpening Stone (#1200)

Miyagoshi Seito (宮越製陶) is a small manufacturer from Kyoto that has specialized in the production of durable and precise sharpening stones for decades. The Ajisai 1200 model is a medium grit sharpening stone, made using the vitrification process – fired for 36 hours at a temperature of approximately 1300°C. It is characterized by high hardness, stable structure, and very low wear during use.

The medium grain size of approximately 9.5 microns allows for precise, yet effective, abrasion – ideal for regularly maintaining the sharpness of kitchen knives and work tools. The stone works well with both carbon and stainless steels.

Application of #1200 grit

1200 grit is in the upper range of medium stones and works best:

• for daily sharpening of well-maintained knives,
  
• as the last stone in a simplified sharpening system (no need to finish with #3000+),
  
• for preparing the blade before finishing on high- grit stones (e.g., #3000, #6000).
  

Thanks to its hard structure, Ajisai 1200 ensures precise blade guidance and constant, controlled abrasive aggression.

Characteristic features:

• handmade in a small workshop in Kyoto,
  
• vitrification process (36 hours at 1300°C) – high resistance and stability,
  
• low wear – very slow abrasion, retains flatness,
  
• ideal for carbon and stainless steels,
  
• smooth, controlled abrasion – pleasant feel when working,
  
• aesthetic finish – marbled blue and white color.

Specifications:

• Brand: Miyagoshi Seito (宮越製陶)
  
• Product name: Miyagoshi Ajisai 1200
  
• Type: sharpening stone – medium grit
  
• Grit: #1200
  
• Average grain size: approx. 9.5 microns
  
• Abrasive: aluminum oxide (Al₂O₃), zirconium oxide (ZrO₂)
  
• Binder: vitrified bond (vitrified bond)
  
• Production method: pressure molding, fired for 36 hours at ~1300°C
  
• Color: marbled, blue and white
  
• Dimensions: 205 × 75 × 25 mm
  
• Weight: approx. 800–900 g
  
• Origin (Made in): Kyoto, Japan