I wonder if Japanese natural stone would be wasted on western blades? Chisel sharpening does not seem as challenging as plane blades, I am quite happy with my chisels cutting ability.
I do use a nagura slurry stone periodically but have not achieved anything but a mirror polish.
One of my Japanese chisels flew out of my hand onto concrete & chipped the blade corner quite badly so brittle steel is not without issues.
It did prompt me to buy a high density rubber mat.
You can do a lot with very little! You can do a little more with a lot!