i'm sorry to be the bearer of bad news but the sword is not japanese it is chinese and there are alot of them coming out of china now and finding there way in auctions, gun shows, flea markets,with signatures, perfect fitting habaki's, temperlines, wwII mounts, etc etc. japanese swordsmiths did not make damascus blades. do not confuse the hamon (grain) as being damascus. stay away immediately from a damascus japanese style blade....sorry to tell you this but it wasn't a too costly mistake. and we have all made them....i did read somewhere that one japanese swordsmith worked in damascus but you can only imagine how rare it would be to find an example of his work...if i can find that information again in one of my books i will post it for you....but for the time being, if you see a damascus japanese sword...run. if it makes you feel better, i've seen people pay hundreds of dollars for some of these blades.