A lot of tsunami debris from Japan make its way to our coasts. So there’s a current.
And as I understand it, the Japanese used to use glass balls for floats for their fishing nets back in the day. They can still occasionally be found up in Alaska.
Well, finding Japanese stuff in Alaska makes sense since from what I can tell that’s where the warm northbound Japanese Current ends up and also where it turns to become the cold southbound Alaskan current.