Back number and Iyori Shimizu

Back number is a Japanese rock trio from Gunma Prefecture, formed in 2004. They are known for their pop rock and J-pop sound, captivating audiences with melodic hooks and emotive lyrics exploring themes of love and introspection. Popular songs include "Christmas Song," "Happy End," and "Takane no Hanako-san." Their albums, such as "Encore" and "Chandelier," achieved chart success. The band has a major following in Japan.