I came into possession of this sword about a year ago. I was told my grandfather came to possess it either during or just after WWII. He worked on a minesweeper, so he probably didn't acquire it from the source. It has no serial numbers, so I don't believe it is a military sword. The blade is about 22 inches with the overall length being about 28 inches. There are no markings on the tang that I can see. The tsuka has markings around the "rim" and both sides of the tsuba have markings. All markings are hidden when the sword is fully assembled. As a complete novice I'm having a hard time finding a direction to look for information on the sword.
Hopefully I attached detailed enough pictures. I know I didn't include a pic of the tang. I can do that, but there were no markings I could see. Thank you in advance.