Hi Jake,
Welcome!
I agree with Jim on the age, and I'd add that we can't rule out Chinese manufacture either. It is, unfortunately, a fairly generic shape, and they're selling them even now for the martial arts community.
The interesting thing to me are the decorations. I'll admit I haven't seen them before, but if they are original to the piece, they're probably our best clue for figuring out who made it.
Best,
F
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