Ariake (有明) is a district in Kōtō, Tokyo, Japan. It is best known as the region adjacent to and directly east of Odaiba. Ariake is subdivided into four chome and comprises part of the Tokyo Bay Landfill No. 10 and Tokyo Rinkai Satellite City Center. As of April 2012 its population was 6,145. Its postal code is 135-0063.
Ariake is most well known internationally as the site of the Tokyo Big Sight international exhibition centre. Other important facilities located within Ariake include the Differ Ariake Arena, Ariake Tennis Forest Park (Ariake Tenisu no Mori Kōen), Ariake Coliseum, Ariake Sports Center, Massachusetts Mutual Life Insurance Company, Tokyo Ariake University of Medical and Health Sciences, the Japanese Foundation for Cancer Research and the headquarters of Universal Entertainment Corporation. Ariake is a center for shipping in the pulp and paper industry.
The failed Tokyo bid for the 2016 Summer Olympics proposed holding many of its events in Ariake.