Hello jseeby,
I don't see what you see. You've written down what could be construed as 松崎 (Matsuzaki) which would be someone's surname. It's unlikely someone would just randomly inscribe a location name on the part you've shown (called a "seppa"). Actually its also pretty implausible that someone would inscribe their surname on the seppa too, but slightly less implausible than someone inscribing a location name on the same.
Be that as it may, the actual scratchings on the seppa you've shown do not look like any sort of authentic Japanese inscriptions (in my opinion... some of the other readers might have a different view). They just look like odd bits of kanji, or things that are meant to look like kanji. They look strange and out of place. But as I mentioned in another thread, WWII-era swords have minimal monetary value as antiques anyway, as most of them were mass-produced in factories. The seppa is just a functional piece to the sword, and you wouldn't normally find an inscription on it. Even if you did it wouldn't really mean much. The sword itself is the important thing.