Splatoon is a Japanese video game franchise with the premise of fictional bands and idol groups, whose members are voiced and performed by real-life musicians. As of 2024, the franchise is composed of three major idol groups: the Squid Sisters (who debuted in Splatoon in 2015), Off the Hook (Splatoon 2 in 2017), and Deep Cut (Splatoon 3 in 2022).