Two sources are http://japanesechefsknife.com/WhetStonesForSale.html http://japanwoodworker.com/dept.asp?...&dept_id=13238 For touching up, you'll want a fine grit. I have the 1500 fine grit from the first link. It's surprising how much metal these things can take off. Rough would be for starting from scratch with a dull blade.
8/1/08 at 3:45pm