Looks like Magoroku. From Mino/Noshu (in Gifu Prefecture).
Well, to be honest i sent him an email early this week, but have yet to hear back from him.
Though there's a chance
Bad luck with the stone, but good that it's turned out positively. My guess is the stone might still turn up!
I am trying to fined out what the make of this knife is and where it comes from?