japanese coin

This is my 3rd time hitting up this park that used to be a field that had Confederate units close by. Same park I found my first Enfield and another possible CW bullet. I spent around 3 hours there today. A nice lady came up to me today and was chatting me up and then asked if i had a pin...

Found a coin today. It has asian writing on it for sure but I'm not sure what it is. Looks like a Japanese Yen maybe but I cannot i.d. it. Need some help. Thanks y'all