I Don’t Like Mondays.

I Don’t Like Mondays. is a Japanese pop rock band from Tokyo formed in 2012. Active since the early 2010s, the group consists of CHOJI, KENJI, SHUKI, and YU. Its music is built around hook-heavy pop, rock, and dance-oriented production. The band made its major-label debut with Nippon Columbia in 2014 and released the mini album PLAY that year. It followed that with the full albums TOKYO in 2015 and FASHION in 2016. In anime, I Don’t Like Mondays. performed “PAINT” for One Piece. In 2026, “Groooovy” was previewed in a new trailer for Black Torch before serving as the series’ ending theme.