Yesterday Softbank Mobile announced that they will start iPhone service in Japan this year. With 18 million customers, Softbank is the third largest carrier in the country after Docomo and KDDI. The Japanese iPhone will be the 3G (WCMDA) version. A lot of people speculated that Docomo would be the carrier for iPhone, but Docomo simply thought Apple was asking for too much in the revenue share agreement. Apple has been playing Docomo and Softbank off each other for months.