SoftBank has announced that it registered 229,500 net new subscribers in June, outpacing rival carriers NTT DoCoMo and KDDI. The Wall Street Journal reports that while the company doesn’t break out specific iPhone sales numbers, Apple’s handset—particularly the iPhone 4, which launched in Japan on June 24—is likely to have made a substantial contribution to that figure. Overall, SoftBank has added roughly three-quarter of a…
