The Japanese social networking site Gree plans to open three new offices in Beijing, Singapore, and London, respectively, to expand its overseas markets.

According to reports in foreign media, Gree said that the opening of these offices aim to help its expansion in China, Southeast Asia, and Europe. The company already set up a subsidiary in the U.S. in January 2011.

Gree offers a variety of functions that support members’ information sharing, including a profile page, diary, communities, photo sharing and emailing. Initially only for computer users, Gree broadened its service range and started the SNS for smartphone users. It also offers free-of-charge mobile phone games to its users.

The social media company claimed that by the end of 2010, the number of its users increased by 56% year-over-year to 21.13 million. The website is popular with young people between 16 and 30 in Japan.