Japan: Prime Minister’s Office Starts Using LINE App · Global Voices
Keiko Tanaka

The Japanese prime minister's office has opened an account [ja] on LINE, an instant messaging application for smartphone and PCs, to provide useful information to citizens, such as disaster information in case of emergency.
LINE is ran by NHN Japan, a subsidiary company of Korean Internet giant NHN. The PM's Office also uses other social media including mixi, Twitter, Facebook and YouTube.