About This Item
Vintage Nakayama Maruka Kiita Yamazen Japanese Natural Sharpening Stone 1782g (3Lb. 15oz.)
***After took the pictures, I took the video, so in the pictures, it shows lots of scratches on the sharpening surface, but before took the video, I lapped the sharpening surface, so the most of scratches were gone, and it became very nice sharpening surface. Please check up the video***
It still has an original Yamazen Junshin Shohonyama paper box (in fair condition). It does not have Hatahoshi stamp on the top, because it was used. I cannot read the letters, but I see slightly maruka stamp on the one of the side face.
#6000 to #10000 or higher grit for finishing razor blade
It raises enough amount of black slurry quickly, and the sharpening surface is very smooth, and the line does not bother sharpening to me, so it does 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 silver color, and Hagane became to mirror finish. They are very nice finish, and I guess it is finest class natural Japanese sharpening stone, and it looks typical excellent Nakayama Kiita as a large size 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. Nakayama Maruka is highly sought finishing whetstone even in Japan, because the mine was closed, and harder and harder to find. 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.