About This Item
AOTO Natural Sharpening Stone from Kameoka, Tanba 1530g (3lb. 6oz.)
197mmX57mmX55mm It should be around #1000 grit (medium grit)
It is a nice size excellent shape Aoto whetstone that is hard to come by nowadays.
It raises good enough amount of slurry, and it is not too hard and not too soft.
(Scale; 1 to 10, 1-3 is very soft muddy rough grit whetstone 3-6 is soft medium grit whetstone, 6-8 is hard medium grit whetstone, 8-10 is fine grit whetstone)
Particle Size--------- 6.5
(Scale; 1 to 10, 1-3 give deep scratch marks to the steel, 3-5 is delete the 1-3 scratches, 5-8 makes the steel cloudy, 8-10 makes the steel semi-mirror finish or mirror finish)
My blue II steel blade knife Jigane became frosted silver color with medium grit whetstone marks, and Hagane became dull silver color with medium grit marks.
It was from Kameoka, Kyoto. It has been very hard to find nice Aoto nowadays since all Kameoka mines had closed years ago, and the most of whetstone companies run out of Aoto stock now.
AOTO whetstone from Kameoka, Kyoto is very famous as Tanba no Aoto in Japan as medium to medium high. It has been mined from Kameoka , Kyoto since Muromachi era (1338-1573).
Natural whetstone has more wide capacity than artificial whetstone, and actually, we do not know until sharpen blade on the stone. Sometimes, treasure whetstone is found after used it for a while. Never know until then.