FT Island’s “Theory of Happiness” sweeps Japanese ringtone charts

FT Island has stormed Japan’s ringtone charts with upcoming Japanese single.

FNC Entertainment announced that FT Island’s newest single “Theory of Happiness” ranked at the top of Japan’s K-Pop Asia Daily Chart of Recochocu ahead of its official release. The song also topped Dwango's K-pop ringtone weekly chart.

“Theory of Happiness” is included in the group’s 11th Japanese single of the same name to be released on July 24. The song was chosen as the ending theme of an animated film ‘Toriko’ and the background music for a commercial for a Japanese restaurant chain.