Umajiyama is quarried near the Ohira mine in Kyoto.
These stones are medium-hard, around 3 out of 5, which makes them easy to work with and forgiving—even for those without much experience using natural whetstones. They cut quickly and easily generate their own slurry, making the sharpening process both efficient and intuitive.

Dimensions: 203 x 43 x 30 mm
Weight: 582 grams

The kasumi (mist-like finish) that Umajiyama produces can be described as softly hazy. The edge achieves a fine balance between high polish and strong bite. We highly recommend it!

A stone that suits both the curious beginner and the seasoned enthusiast alike—Umajiyama delivers feel, control, and beautiful results.