Peter,
So what are the dimensions? 32 nagasa? Even in oshirae, this sword is never 59 cm long. Please correct these data.
This is not a Yamashiro blade (which means that you have go back to the books). And no, this is not a mokume hada.
What I can say is that this is likely a shortened, late Muromachi wakizashi from the North of Japan. Going by provinces, the suspects would be Etchu, Mutsu, Dewa, Echigo.
You can read this highly interesting article on Danny Massey's site:
http://www.nihontocraft.com/Ura_Nihon_no_Toko.html
And no, don't jump to the conclusion that you have a Norishige
It would help a lot if you could post better pictures of the habuchi. What we see now is the hadori polish (not the best, from what I can see in the pics). I know this is very had to photograph.