Line was designed by 15 members of new human network (NHN) Japan's development team,composed of chinese,Korean,japanese and American engineers. The idea of line communication system Was proposed to NHN japan by lee has jin,the chief strategy officer of NHN. It first launched in
Japan in 2011,reaching 100 million users within eighteen months and 200 million users only six Months later Became japan's largest Social network in 2013.In october 2014 line announced that it had attracted 560 million users worldwide with 170 million active user accounts.In february 2015, it announced the 600 million mark had been passed and 700 million were expected by the end of the year.