The Tokyo Metropolitan Symphony Orchestra (東京都交響楽団, Tōkyo-to Kōkyō Gakudan), also known as Tokyō (都響), is one of the representative symphony orchestras of Japan. The Orchestra was founded in 1965 by the Tokyo Metropolitan Government, to commemorate the Tokyo Olympics (1964 Summer Olympics).

Tokyo Metropolitan Symphony Orchestra (TMSO) 東京都交響楽団
Orchestra
Founded	1965
Concert hall	Tokyo Bunka Kaikan, Suntory Hall, Tokyo Metropolitan Theatre
Music director	Kazushi Ono
Website	Tokyo Metropolitan Symphony Orchestra

Currently Kazushi Ono serves as Music Director, Alan Gilbert as Principal Guest Conductor, Kazuhiro Koizumi as Honorary Conductor for Life and Eliahu Inbal as Conductor Laureate.

Their offices are based at the Tokyo Bunka Kaikan, a concert venue owned by the Tokyo Metropolitan Government. They perform regularly at Tokyo Bunka Kaikan, Suntory Hall and Tokyo Metropolitan Theatre.

Traditionally, the Orchestra performs the works of Gustav Mahler as an important part of their repertoire. Hiroshi Wakasugi, Eliahu Inbal and Gary Bertini have performed all the symphonies of Mahler with the orchestra.

The Orchestra has received much international acclaim through overseas performances in Europe, North America and Asia. In November 2015, They brought a tour in Europe under the baton of Kazushi Ono, which was highly acclaimed.