A genuine Japanese katana and looks to be older than a second world war blade.
Based on shape of the blade and condition of the tang, I'd guess this to be from the late Koto to early Shinto period, 1500's to early 1600's, but take that with a pinch of salt.
Tang appears original so probably not shortened at any time.
The flaws are unfortunate and could possibly suggest the blade is of lesser quality. The period I mention above was a time of much fighting and many lesser quality blades were made to keep up with demand. These blades are known as Kazu uchi mono swords and came mainly from Bizen and Mino provinces.
The mounts seem in good order. Again, not top quality but fairly good.
The fuchi and kashira are done in a pattern calleed Nanako, meaning fish roe, and look to be made of shakudo or copper. Good nanako is hard to do and these look to be good quality. Probably date from 1600's to 1800's...any signature on the fuchi?
Tsuba is interesting. Iron sukashi (openwork), design looks to be of two kamon or family crests. One of the mon appears to be the Kirimon which was a government crest, so the design probably relates to the unity between the gov. and the other family shown. Possibly Owari school, possibly Kyo sukashi. Dating is hard from what we see but again, 1600's to 1800's, would be a safe call. Any signature on the tsuba?
Overall condition seems good so no need for costly restorations.
I'd get some light grade mineral oil and keep it lightly oiled to maintain it.
There are a few sword shows in the US where you would be able to get a more informed opinion from an expert with the blade in hand.
http://www.nihontomessageboard.com/ is a good site that will provide maintenance tips, a wealth of information, and more opinions on your sword if you post there.
