Shapton does not require a nagura. Very little water, just enough to
wash away the abraded particles. My one chisels are shinny enough to
count pores when done with the 5000, let alone the 8000.

I suspect an improper technique. Personal experience with the Shaptons
vs scary sharp is Shapton is much sharper at 8000 vs SS 2000 which is
quite comparable.

Alan