The iPhone continues to be the key for growth and profits with cellphone carriers in Japan, as third-ranked provider Softbank Corporation posted a 65.4 percent increase in profits for its fiscal year, which ended in March. The company credited growing subscriber numbers and iPhone 4S demand as factors, despite the emergence of rival KDDI Corporation as an alternative provider of iPhones. The company had spent heavily on promotions to avoid having customers change to KDDI.