99% sure it's a Pokémon coin. I saw it in a Japanese Pokémon TCG tabletop battle video, but it was hard to make it out. Then I found this picture of it in someone's personal collection of over 400 Pokémon coins (This wasn't just a random eBay bundle) when my attempts to search for it by name proved fruitless and I decided a large coin collection would probably be the place to look, and I recognized it instantly.
The art is very stylized, though, so I can't make out what Pokémon it's meant to depict. It looks like some kind of in-universe hieroglyphics. Johto immediately came to mind. I looked up "Yu-Gi-Oh coins" just now to make sure it isn't a Yu-Gi-Oh dragon coin, and didn't see anything like it.