It appears to be a yanagiba. A yanagiba is primarily used to slice already-trimmed proteins, and is one of the knives used in a traditional, professional, Japanese, three-knife set. The other two are the deba and usuba.
Looking at the proportions, I'd guess the length of the knife at 210mm. That's on the short side for that type of knife, but hardly uncommon.
I can't tell you anything about the quality of your knife or the identity of its maker; but the price range runs from very cheap to incredibly expensive. Try posting the pic on a knife forum with some members who read Japanese.
There are many ins and outs to using and sharpening a yanagiba. You'd be better off talking to someone who uses one.
BDL
Edited by boar_d_laze - 7/10/12 at 8:14am