About This Item
Ohira Renge Suita Japanese Natural Sharpening Stone 762g (1lb. 11oz.)
193mmX65-67mmX24-27mm Fine grit finish for high carbon cooking knife or Japanese plane and chisel
It has beautiful Renge pattern on the sharpening surface.
It raises very good amount of black color slurry quickly. It is kind of hard stone in Ohira suita.
(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------ 8.9
(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)
It makes my blue II steel blade knife Jigane to frosted bright silver color, and Hagane became semi-mirror finish to mirror finish.
Probably around from 4000 grit to 6000 grit. It is from Ohira mine where has been mining five generations of Ohira whetstones. Ohira mine produces Awasedo (finishing whetstone), Suita, and Uchigumori. Ohira is very famous whetstone as Japanese sword sharpening hone as Uhigumori. Ohira Suita is one of the favorite whetstone to Japanese carpenters, because it is fast cut in the fine grit whetstones. Natural whetstone has wider capacity than artificial whetstone, and actually, we do not know until sharpen blade on the hone for a while. Because artificial whetstone molecules do not break down to smaller sizes, but Natural whetstone molecules are possible to break down to smaller sizes, and those molecules are mixed with sharpened steel molecules, and make Jigane as suitable Jigane color (it also shows Damascus pattern vividly), and Hagane as suitable Hagane color. It is natural mystics.