So, if Roman coins made it to Japan, the great Japanese tsunamis of 684 869 887 1293 1361 1498 or 1605 may have delivered them to a number of different places.
Oh, and as we've seen with the latest event, there's enough stuff carried along it is conceivable the debris fields could have supported a number of travelers as well ~ thereby explaining Japanese in Arizona, El Salvador, Chile, etc.
Exactly.
Happy to be alive on dry land...anywhere.