Price depends on provenance, size, and thickness. The stone does appear to be a performer with just diamond slurry and room for yet more refinement.
The original chip looks like impact damage of something round and hard, faucet or counter edge, too large for a stone occlusion. I would expect some residual edge micro chipping after it appears the chip was removed.
Impact damage usually goes much deeper than the bottom of the chip, note the grain disruption below the bottom of the chip. (arrows) Once honed out stropping will stress any weak spot and can microchip out.
While I usually hone out any damage with synthetic and joint or breadknife the edge flat and finish on a natural, removing a chip is a good test for a stone. This one is aggressive, leaves a nice finish and straight edge. Should shave well.
You can experiment with other Tomo and Mikawa Nagura (white stone) to refine the finish and edge. The Mikawa nagura market is challenging and Asano (stamped) can be suspect and wildly priced. For a razor honer a single Mikawa stone can be a lifetime purchase, so buy wisely. Prices in the last few years have skyrocketed and some stones difficult to find.
As with all-natural stones, performance will vary, some stones work better together. It is after all a synergy or honing stew.
If you use a synthetic bevel setter, you do not need a full Mikawa progression and can jump to a Tenjyou or Mejiro after diamond slurry. and finish on Koma or tomo.
A Tsushima Black Nagura is one of my favorites after bevel setting, in place of diamond slurry. It is very aggressive and removes 1k slurry quickly yet breaks down to polish finely if worked.
From the Tsushima I go to a Tenjyou, then Koma or tomo. A lot depends on the base stone and the razor hardness.
I use thin slurry and prefer to add slurry for aggression if needed rather that dilute a thick slurry. It is a matter of experimentation.
All Nagura, with exception of Diamond and Tsushima Black are finishing slurry and even they can be worked down to finishing slurries, so experimentation is key. It is not like one would need to reset a bevel if the nagura progression is not working out, just add more slurry or switch to a finer nagura and polish out the unwanted result.
It appears that the Ozuku is aggressive yet capable of delivering a finished edge. With still some room for improvement with nagura experimentation.
Were I you I would look at a Tsushima Black and a Asano stamped Mikawa Tenjyou for your next level of honing and Koma down the road.
I would invest in Nagura rather than accumulating more Awasedo. And it can be a bit of an investment. Any nagura you acquire can work with other stones down the road, so none would be a waste of time or funds. It is a matter of finding the right combination for the stones, razor and technique.Attachment 329271