"Music" (Japanese: ミュージック, Hepburn: Myūjikku) (Japanese pronunciation: [mjɯ:ʑik:ɯ]) is a song by Japanese band Sakanaction. It was released as a single in January 2013, two months before the band's sixth album Sakanaction. A progressive dance rock song, "Music" was adopted as the theme song for the Yōsuke Eguchi-starring drama Dinner while the band's songwriter Ichiro Yamaguchi was struggling to write lyrics for the otherwise finished composition. Inspired by the cooking drama's theme of professionalism, Yamaguchi themed the song around his own experience with professionalism, relating it to his career as a musician. The band performed the song at several high-profile venues, including NHK's Music Station and at the 64th Kōhaku Uta Gassen New Year's musical competition.

Critics believed the composition was different structurally to a regular pop song, and challenged general notions about what constituted pop music, and was a high quality song, despite the single's apparent commercial-focus. Commercially, the song performed well, reaching number one on the Billboard Japan Hot 100 chart.

In September 2011, Sakanaction released their fifth studio album Documentaly, which had reached number two on the Japanese Oricon albums chart; the highest position achieved by the band in their career at the time. The album was strongly affected by the events of the 2011 Tōhoku earthquake and tsunami which had occurred in March of that year, during the promotional period for their single "Rookie". The band's vocalist and songwriter Ichiro Yamaguchi felt a new resolution to create music that would resonate with a general pop music audience, who listened to idol acts such as Girls' Generation and AKB48. As rock music was no longer a popular staple during the early 2010s in Japan, Yamaguchi felt that the reasons people listened to music had changed over time, and wanted to mix rock music with entertainment-focused music in order to give these people the type of music that they look for.

...
Wikipedia