Mixi is an online Japanese social networking service. It was founded in 1999 and is owned by Mixi, Inc.. As of September 2012, Mixi had about 14 million monthly active users, with about 8.6 million of those on smartphones. Mixi, Inc. was founded by Kenji Kasahara in 1999 as a limited liability company and became a Japanese corporation in 2000. The company changed its name to Mixi, Inc. from E-Mercury, Inc. in February 2006 to align its name with the social networking service, and was updated to MIXI, Inc. in 2022. Its headquarters are in Shibuya, Tokyo.