"Facebook’s chief operating officer Sheryl Sandberg said in an interview with Japan’s business daily The Nikkei that Facebook has reached 15 million active users in Japan, surpassing Japanese social network Mixi.... Facebook has had difficulty penetrating the Japanese market and this marks the first time the company has surpassed Mixi’s MAU."
Source:Facebook overtakes Japanese social network Mixi in Japan
Jonathan Espinosa
Sep 13th, 2012
Inside Facebook