How do I find the original dealership that imported my 1981 Datsun 210?

I have a 1981 convertible Datsun 210 that was sold by a dealer in California who had an order from Hawaii to have 500 made into convertibles. He shipped 498 of them to the customer and kept 2 for himself. He sold one and kept the one I currently have in my possession or so the story goes. I have the information on the car (VIN, etc.) from the plant but I need to know how to get information on the vehicle, especially the dealership, after it left the plant in Japan. Any suggestions?
Thanks!
VIN# JN1PB02S4BU664663
Production seq. # 664663