No.2122 Ohira Suita Renge


#2122 Hoard Ohira Suita with renge

A super saturated red renge suita from the Ohira mine. A Hoard stone this is a medium hard stone that is easy to use with hard steel tools or razors. The base component of this includes yellow sands, and red radiolarian,  a silica element that was formed by the conglomeration of ancient casts of radiolaria which filtered to the ocean beds 225 million years ago. The yellow sands percolated
onto the radiolarian as sediment. So you can see that the stone has a faint yellow cast with red spots.

I honed a Henckles razor after bevel setting on a 1k King stone. On this without slurry, just clear water after setting the bevels edges began to  refine and I could observe this happening within just 20 strokes. I deem this to be a very fast cutting stone. Next I made a light slurry with a tomonagura and this speed up the cutting by many times over.

This stone can easily hone up a straight razor, or be used to sharpen a tool or a knife blade to razor sharp. A rare stone considering that the Ohira mine was opened in the first half of the 1800's. This stone was mostly likely mined in the last quarter of the 19th century and slabbed somewhere between 1880 and 1920.
There is one corner missing on this stone and the price of the stone is reflected in the value. I also found one very minor bias seam towards one end outlined in the bottom photo.

The stone (toishi) has been lapped flat and the corners and edges beveled unless otherwise noted. All of my stones come with a tested and appropriately sized tomonaguara slurry stone, and a money back guarantee minus the return shipping.


Hardness                  9

Particle Size              9++

Speed/Cutting           9+ to 10+ with slurry

  • SIZE

    208-81-30 to 38 thick in mm


    Every single stone I sell comes with a full money back guarantee minus the return shipping, I am happy to work with the professional crafts person as well as individual hobbyists.