ELLEGARDEN is a Japanese rock band formed in 1998, known for their melodic punk-inspired sound and English-language lyrics. Drawing influence from Western alternative and pop-punk bands, they became one of Japan's most beloved indie acts before going on hiatus in 2008. Their reunion in 2018 was met with major fanfare, reaffirming their legacy in the Japanese rock scene.

In 2018, ELLEGARDEN invited ONE OK ROCK to join them on their "THE BOYS ARE BACK IN TOWN" reunion tour. The two bands shared the stage at multiple dates, including major venues like ZOZO Marine Stadium, highlighting the mutual respect between the two generations of Japanese rock icons.