Having been to various port complexes in Japan over the years, someone probably just delivered it to the wrong dock.
On a serious note, I'm sure Jurgen will sort you out soonest. Just proves that a) there are scum everywhere, and dealing with a professional and competant dealer/importer is worth it.
Jurgen has recently started importing from America, so I am thinking of getting my Corvette from him. Need to see how clued up on them he is first.