Getting a ZR-1 to Japan

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HAWAIIZR-1 - I am retired Navy and contemplating a civilian job in Yokosuka. I was stationed there in the late 90's so know about the vehicle taxes and registration hurdles ever year but never looked into getting a car there. I should probably be worried about schools and housing but need to know how you got your ZR-1 over there. Were there any modifications required? I have a completely stock 91 ZR-1 with 21K miles and don't want to have to modify anything I can't put back to original when I return. I also have a 91 Z28 and 96 Corvette Collector Edition Conv but if I have read correctly, there is a two car maximum per family so they will need to stay in storage. Any information you can provide on how you got it there and what needed to be modified would be much appreciated.