Ryuichi Sakamoto (坂本 龍一, Sakamoto Ryūichi?, born January 17, 1952) is a Japanese musician, activist, composer, record producer, writer, singer, pianist, and actor based in Tokyo and New York. Gaining major success in 1978 as a member of the electronic music group Yellow Magic Orchestra (YMO), Sakamoto served on keyboards and sometimes vocals. The band had worldwide hits such as "Computer Game / Firecracker" (1978), "Behind the Mask" (1978) and "Rydeen" (1979), later playing a pioneering role in the techno and acid house movements of the 1990s.
He concurrently pursued a solo career, releasing the experimental electronic fusion album Thousand Knives (1978), and later released the pioneering album B-2 Unit (1980), which included the electro classic "Riot in Lagos". From thereon, he produced more solo records, collaborated with many international artists, and pursued a wide variety of projects, such as having composed music for the 1992 Barcelona Olympics opening ceremony. His composition "Energy Flow" (1999) was the first instrumental number-one single in Japan's Oricon charts history.