The Shobu stone is an excellent mid-range polisher, or finishing stone for those who want a great follow-up for a 2k or 4k stone. We estimate this stone to be in the 8,000 grit range. When followed by an Asagi stone, it can produce an edge that will easily be shave-ready with a handful of strops on fine compound. The smooth feel aids in polishing the edge, which this stone will produce a semi-mirror finish. Like most naturals, the finish is a bright matte that is nice and uniform.
It is fairly hard like most natural stones, but with a soft feel and is rather forgiving as far as naturals go. It will produce a fair amount of mud with a nagura, but isn't what you'd classify as a "muddy" stone. Like most naturals it is very slow wearing and should last you for years and years. These stones really shine on carbon steels like Hitachi White and Blue, or 52100, and also work great on stainless as well.