Template:Uchouten Song

The band's first single in nearly three years, "Uchouten" is a hard rock song designed to work well in a live setting with several call-and-response moments, priming it as a crowd pleaser. Koshi described it in the band's 2015 New Year's message as the "first new explosion of B'z sound in a long while" due to the hiatus between releases. The composition includes a bass solo prior to the guitar's and sports an arrangement that utilizes both solo guitar and full band instrumentation at alternating intervals. On the lyrics front, Koshi mentioned in a press release for Gakkou no Kaidan—a school-centric drama series for which the song served as a theme—that he focused on the themes of "confidence and insecurity, happiness and sadness" and added, "This song is about cheering oneself up and trying to move on, while embracing these two conflicting feelings."