On January 12, 2014, their album producer John Feldmann tweeted that One Ok Rock had already started recording their new album. Their first single from the forthcoming album, "Mighty Long Fall", was the theme song for the movie sequel of Rurouni Kenshin. One Ok Rock released the new single "Mighty Long Fall/Decision" on July 30, 2014. The song "Decision" is also the theme song for their documentary film FOOL COOL ROCK. The music video for "Decision" released on August 20, 2014, is a compilation of footage from their tours in Europe and Asia. They also revealed the theme song for another movie sequel of Rurouni Kenshin entitled "Heartache".
