Description
Kosaka stone from Gunma Japan
Kosaka mine was closed in the early Showa period 1930
So this is very old stock we got there.
I think it is faster and feel better then binsui stones and feel also better
Finish is very clear without any scratchiness and with some small scratch patterns
They alwais came raw so not much flattened and need ofc some flattening before use
grit approx 1000-2000
Max size: 230mm 80mm 90mm
