Japan's social-networking pioneer turns matchmakerThere was a time when the only social network that mattered in Japan was Mixi, but these days, after years of stagnation, it is hardly heard of in daily conversation — being replaced in popularity by rivals such as Gree, Mobage, Twitter, Facebook and most recently Line. Now, however, Mixi is adding marriage/dating businesses to its basket. Is this simply a desperate move to regain relevance or a f
