"Top Secret" is a Japanese-language song by South Korean rock band F.T. Island. It is their eight single under Warner Music Japan and 11th single overall in Japan. The song was written by Kenichi Maeyamada and composed by Corin. It was released on August 8, 2012, in four editions: a CD-only edition, a first press edition, a tour venue edition, and Lawson edition. The single debuted at number six on the Oricon weekly chart, selling 34,000 copies in its first week.