As we know America is the biggest developed nation.they take a importent role in the world.Japan is a studiously country.we can see the history,after the world war II,japan lose the bell and also bring disgrace on japanese.the national pride arouse they must grow up again as fast as they can.so they follow america,study a lot from them.so not for a long time,the world was here to witness a big rise.that is also why japanese now so interest about all of America.