F.T. Island (Korean: 에프티 아일랜드, Japanese: エフティー・アイランド; stylized as FTISLAND), short for Five Treasure Island, is a five-member South Korean pop rock band formed by FNC Entertainment in 2007. The band consists of Choi Jong-hoon (leader, guitar, and keyboard), Lee Hong-gi (main vocals), Lee Jae-jin (bass and 2nd vocals), Song Seung-hyun (guitar, vocals, and rap) replacing Oh Won-bin in 2009, and Choi Min-hwan (drums and sub vocalist). On the other hand, F.T. Triple (A3), a sub-group of F.T. Island consisted of Jong-hoon, Jae-jin and Min-hwan, and has been inactive since 2012. F.T. Triple has released singles and sang soundtracks for dramas such as Master of Study.
F.T. Island debuted in Korea on June 7, 2007, with the song, "Love Sick" on the music television program, M Countdown and debuted in Japan three years later, on May 19, 2010, with "Flower Rock". F.T. Triple's first single was "Love Letter", which was published on YouTube on 22 August 2012. The band then promoted the single on various music programmes in Korea. Main vocalist Hong-gi made his solo debut in both Korea and Japan with a mini album and a full album respectively. The Korean album was titled as FM302, and the album was released on 18 November 2015, while the Japanese album was titled as AM302, which was also released on 9 December 2015.
F.T. Island has released fourteen full-length albums, eight mini-albums, a number of singles and soundtrack productions for different drama theme songs and anime openings. F.T. Island is considered to be South Korea's first instrumental idol band. Their debut album, titled Cheerful Sensibility was the sixth best-selling album in 2007. Their debut song "Lovesick" topped the K-Pop charts for eight consecutive weeks. They are also the first Foreign Male Band to top the Oricon Daily Charts, which is the first band to top it in 42 years.
They had also won various prestigious awards such as the Golden Disk Awards and Seoul Music Awards.