i phone 4 was out with Softbank and 4S is out with Softbank and KDDI. The more smartphone users are in Japan the more connection capacity is full. The following article predicts more WIFI service in the US will no longer be free of charge. Japan has not much free WIFI and should not follow the US.
http://www.nytimes.com/2011/10/25/business/ipads-change-economics-and-speed-of-hotel-wi-fi-on-the-road.html?_r=1
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