The Chuo-ku Tennis Association is an association of people who play tennis and either work or live in Chuo-ku. I became a member of the Chuo-ku Tennis Association a few years ago to be able to join tournaments hosted by the association. They usually have singles, doubles, and mixed tournaments at the Ariake Tennis Forest Park.

If you can read Japanese, here is a link to their website: http://www.cta-tokyo.jp