I can't sleep so I dug into the safe and got some pics. I have some nice sawtooth German bayonets as well but I'll dig those out later.
This has the real wooden scabbard wrapped in eelskin which is period correct but is missing a few pieces that go on the pommel of the handle. Original replacement antique parts start at $500 each piece so I'll be holding off in adding them for now.
The lower one is the older and was in a modern metal scabbard that had been made to fit the Nihonto blade. It was carried by a Japanese officer and was taken in battle. The handle has been lost to time and is crazy expensive to have an original put on in Japan now.
This is on the handle and denotes the maker, his school and his rating as a sword maker.
And no self respecting Cavalry soldier would own just Japanese steel. The top pic is a Cavalry saber for an officer that I've had trouble pin pointing a year on. It's covered in rust preventive so it stayed in the scabbard as my wife would use one of the others on me if I got grease all over her blanket. I have rifles from both sides of the conflict in WW2. Pretty much every axis and allies country is represented except for Australia but they used the same rifle as the Brits so my grandfather felt it was redundant I'm thinking. He was a Judge Advocate General attorney after the war and my Mom and uncle grew up in Kyoto while he tried cases against American soldiers accused of crimes by the Japanese after the war.