My friend was looking through an abandoned house when he found a box of these weird looking coin things, some of them look like medallions of some sort. They have markings that look like an asian language, sort of like Japanese kanji or maybe Chinese or Korean. Some of the coins have deer or fish on them, and others have people. A lot have holes in the centers, and some have raised figures and they're thick and heavy. I think they're made of brass or something but I'm not sure, they have a goldish tint to them. Does anyone know what the heck these things are? Or what they might be worth? Thanks!