About This Item
Vintage Nakayama Kiita Nashiji Japanese Natural Sharpening Stone 936g (2Lb. 1oz.)
This Nakayama whetstone came out with many of Nakayama Maruka in used market. I have never seen the stamp on the side which is Ma in Japanese letter and No. 515
#6000 to #10000 or higher grit for finishing razor blade
It is condensed stone in the size that I feel heavy. It raises enough amount of black slurry quickly, and the sharpening surface is very smooth, and it looks fast cut in the same class grit, and the lines on the sharpening surface do not bother the sharpening to me, so it might not need Tomo Nagura or a device that produces slurry.
(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-------------- 9.0
(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 became from bright frosted silver color, and Hagane became to semi-mirror to mirror finish. They are very nice finish, and I guess it is finest class natural Japanese sharpening stone.
Nakayama whetstone is finest whetstone that is mined in Kyoto for almost 900 years ago. I think the mine had been closed more than 30 years ago. It had been very important as military affairs, because it is sharpener for weapons, so the mine had been protected by the Emperor of Japan or Shogun or Japanese Government for a long time. Only Honma family could have mined the mine for a long time. It is ideal razor hone or the cutlery that need very fine finish.
Probably #6000 to #10000 or higher grit with the same as artificial whetstone.
Natural whetstone has wider capacity than artificial whetstone has, 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, and Hagane as suitable Hagane color. It is natural mystics.