Komon - Natural Stone - Uchigumori (No. 001)
One of our most trusted sources handpicks these stones from the famed Imanishi in Kyoto for us, spending hours testing dozens upon dozens and selecting only the best of the best across a variety of price points. These tennen toishi represent some of the highest quality natural stones you will find on the market. When combined with the correct steel, using these gems help you understand the beautiful harmony between stones and steel that skilled polishers sometimes have difficulty describing in words. Working on natural stones with well-made knives truly ties the entire subject together. We are proud to provide such wonderful pieces to you! Because each stone is tested extensively by Komon before being sent to us, we honor their notes and grading system, which we have listed below. Stone: Uchigumori SKU: 251001-UCHI-1 Size: 270mm x 70mm x 30mm Area: Kyoto, Kyoto Prefecture - Japan Mine: Ohira Layer: Uchigumori Est. Grit: 6000-8000 Hardness: Medium Fineness: Fine Cutting Speed: Fast Ease of Use: Easy Recommended Use: Excellent for both hard and soft steel, soft cladding, wrought iron. Interpretation of the Stone: A very smooth, soft, fast-cutting Uchigumori with light karasu patterning throughout one end. This stone is especially easy to use, even on difficult or harder honyaki, and performs exceptionally well on Hitachi and similar steels, as well as harder tamahagane, modern tamahagane, and related materials. It is a very uniform and smooth stone that provides excellent feedback. It was tested on tamahagane, honyaki, Hitachi honyaki, vintage steels, as well as Hitachi steels forged by Tanaka. It performed excellently across the board on all steel types and forging styles it was tested with, offering smooth cutting performance and excellent ease of use. It worked exceptionally well on single-bevel knives, both clad and honyaki. Comes with Tomo Nagura Authenticated On/By: Ivan Fonseca 03/14/2026