This is a slightly hard whetstone. You might notice a character mark slightly to the left of the center.
Dimensions: 63 × 121 × 19 mm
Weight: 350 g
Quarry location: Kyoto Prefecture
* Image 9 shows the stone after water has been applied.
* Image 10 shows the slurry produced after 20 strokes.
* Image 11 shows the finish achieved by sharpening without pre-creating a slurry.