Probably "Yaginoshima Iromono" but not sure. Very fine and smooth.
Detailed Spec
Brand: Hitohira ひとひら Product Type: Natural Stone Producing Area: Kyoto/ Japan Recommended Usage: Kitchen Knife (Edge), Straight Razor, Chisel/ Planes Hardness (5 = Very Hard): 4.1 Grain Scale (5 = Very Fine): 4.2 Sharpening Speed (5 = Very Fast): 3.7 Soaking Requirement: Not required Size: 195 x 72 x 36mm Weight: 1216g Reviewed by Naoki Tsuda Update: 5月 30, 2026
* Measurement and photos are from sample I picked up randomly, please understand that each item(s) has unique profile and colur because of handmade and natural materials.
*Please understand that we are supplying as wholesale and selling it at the website at the same time. If you purchase item(s) after supplied to the retail shop, this might be out of stock.
