Japan's LINE social network could challenge global competitors | The Japan TimesLINE is a cross-platform communication service and app, offered for free by Naver, from NHN Japan. The basic functionality allows users to send text messages and to make free calls with other users who have the app installed on their smartphones. The service launched just 13 months ago, on June 27, 2011, and its growth rate has been simply amazing, with 45 million users currently registered — 20 m
