Maruoyamka Aisa Koppa Japanese Natural Toishi Finishing Whetstone

This exceptional Japanese whetstone was selected and purchased by us directly from Japan, then thoroughly tested and coated with cashew lacquer on sides and back to protect the stone for long term use.

 It measures 145 mm long (5.71 in) × 85 mm wide (3.35 in) × 20 mm tall (0.79 in), and weighs 382 g (0.84 lbs).

Hardness: 3.3
Small sized Maruoyama Aisa koppa. As typical of Maruoyama Aisa, it's a medium soft stone with extremely user friendly feel. Honing on water only is velvety and forgiving with a little self slurry. Forcing more slurry increases the speed and uniformity of the finish. This stone starts cutting more coarse and time must be taken to break down the mud refining the finish dramatically. To finish a razor, light pressure and touch is necessary but it's achievable. Works great as pre finishing stone before a harder and finer Awasedo.