Quote Originally Posted by Nikolay View Post
Is there any ideas how to find most appropriate tomo nagura for the stone?

Should it be exactly the same as stone? Should it be softer?

I have found that sometimes it is too hard to get as good result as Mikawa Nagura could give with a peace of the same stone.
You want softer stone than the base.
The ideal tomonagura is soft, fine and fast, not easy to find combination.