Originally Posted by
Steve56
Hi Vasilis,
It is my impression that the names are geological names and do not vary from mine to mine though not every mine has every layer.
The first stone the tenjyou suita, is a Narutaki or at least it was stamped with that name. The second, the hato, is a current Ohira stone. The sunashi was sold as a Nakayama, and I have seen one other with the very unique color and pattern from a different seller that also described it as Nakayama. The last I believe is an Okudo based on the bright orange skin on the back, but could be Nakayama.
Cheers, Steve