Size：205mm x77mm x39mm
Hardness: Lvl 4
Perfectly finished type60.
It is made in Nakayama, a famous brand of the highest quality.
It has one of the highest hardness among Nakayama tomae. So is the fineness of the particles.
It is recommended for those who like hard grinding stones.
It has been indispensable since ancient times for the maintenance of carpentry tools for shrines and temples. It is also the highest grade for sharpening kitchen knives.
The sharpening feeling is very delicate. There is no other whetstone with such a pleasant sharpening feeling in other mountains. It is the only one of its kind.
The sharpening juice is pitch black.
It has a slight reddish tinge.
Mirror finish is possible.