GREE Holdings, Inc. (グリーホールディングス株式会社, Gurī Hōrudingusu Kabushiki-gaisha) is a Japanese social media company with headquarters in the Roppongi Hills Mori Tower in Roppongi, Tokyo.

[1] It has been operating the social network service GREE since its establishment in December 2004.

The company name GREE comes from a hypothesis, Six Degrees of Separation postulated by social psychologist Stanley Milgram in 1967.

"Six degrees of separation" is a hypothesis that everyone is approximately six steps away from any other person on Earth.

The name symbolizes GREE’s hope to "create and provide any new possibilities of the Internet" and to "create new forms of fun, convenience, and excitement."