Urashimasakatasen

UraShimaSakataSen (浦島坂田船), or USSS for short, is a 4-unit utaites group consisting of Uratanuki (Green), Shima (Purple), Sakata (Red) and Senra (Yellow). They've teamed up in 2013 and opened at least one live tour each year. They also have their own commercial items such as some merchandise. Also, they have a close relationship in real life.

In Spring 2017, USSS formed a fictional unit called "Fourpe" (フォープ Fōpu) under contract with NBCUniversal Entertainment Japan. In Fall 2019, the group received a short deformed animated comedy series, Days of Urashimasakatasen (浦島坂田船の日常 Urashimasakatasen no Nichijou).

(Source: Utaite Wiki)