@ROKUJURO I understand what you mean via the photos. I took about 30 photos at different angles under light and those are the best I could manage. It’s more noticeable to the naked eye, but still difficult to decipher if it’s an old signal or as @Bugyotsuji said may be Gimei that has possibly been hammered off. I’m still learning about Japanese swords as this is my first, but I’m greatly enjoying learning the subject and wish I’d gotten into it earlier. The Wakizashi was a gift and was bought at an antique store a couple months ago. Unfortunately it was not only neglected, but someone has obviously attempted to sand rust off the blade at one point which has left a lot of scratches. It then re rusted over pretty bad. I bought a cleaning set for it and have been letting it soak a few minutes here and there with Choji oil. Also using powdered antler and gently wiping the blade down over and over a lot of rust and what appears to be build up old oil has come off and it’s much nicer looking now. The Hamon is visible on both sides however you have to have it under light to be able to really see it well enough to see what it used to look like. Regardless I’m pretty happy with the sword especially since I didn’t have to pay for it. The Tsuba on it is a dragon motif which I quite like. Especially after I was able to scratch away the massively built up rust that was also hiding a lot of detail. It was almost like an excavation on the Tsuba. Where it looked smooth was actually rust and grime filling in lines and pockets. After scraping those out and discovering what was underneath I’ve really become interested in collecting Tsuba now as well.