Japan goes away taking everything japanese with it. Tens of thousands of years later the legends of 'The missing world of Japan' abound about a wonderful mysterious world of a people technologically advanced with walking talking machines and so many other unique cultural oddities. A wonderful mysterious world of a people with a subculture who put the darnedest anythings and everythings in the darnedest places. Just to point out a couple of exciting things.
I say if japan goes let it go in whole taking everything japan with it. If you do not you will be robbing the future of indulging the mystery of a
bewildering imaginary place of legend.