I'll say "thanks" in advance to anyone that might offer an opinion about the origins of my sword.
For background, I am not particularly concerned that what I have is not genuine. This sword has been in my family for over 50 years. My grandfather brought it back from Japan following the occupation. He died when I was very young, and other members of my family never learned any details about how he acquired it.
I am posting a few pictures, but will tell you a few details that may not be apparent from looking at the pics.
The Tsuba is very plain, I can see no markings on it at all, and it appears be made of iron. The Saya appears to have a 2 tone lacquered finish and steel fittings. The Ito appears to be black silk, and has the look of fabric that has been handled a lot, with an oily sheen to it. It is also frayed at the base of the handle, and the ends that were previously tucked in the Kashira have worn completely through, though the braid is still tied and intact.
The blade is very sharp, and sharpened all the way down to Habaki. There is no arsenal stamp on the tang. There are characters engraved on the tang, but the top characters appear to be obscured by significant rust. The rust is all a dark red and/or orange color. There is a Hamon on the blade, which appears to be thin and of a uniform width the whole length of the blade. I can see no Hada on the blade, but the finish is so poor I cannot be certain there isn’t one.
I know little to nothing about these swords, though as a student of military history I have enjoyed researching it. If I had to guess, I would say that it is from the war years or slightly earlier. I am very interested in hearing more informed opinions.