Real swords were worn only by officers. They could have a machine made military sword or a hand made antique blade that could either be a family piece or a purchase from a sword dealer. As previously stated, this is not mounted for military wear and was likely a piece held at home. It is impossible to say if this came from a samuraii family due to the disbanding of the samuraii. Unemployed, many sold their swords for the necessities of life and their was a redistribution of blades. After nearly 70 years, it is basically impossible to return a sword as the owner is likely deceased and even if you found descendants, after several generations, who would you give it to? There is also the problem of bringning a sword into Japan due to their strict weapons registration policy. As one of my old teachers in swords once said, it is better that some swords remain in the West to be appreciated and educational as to Japanese history and culture.