Ret Bear

Ret Bear (レトベア) is an anonymous Japanese music unit centered on VOCALOID producer Kairiki Bear. Launched in 2022, the project keeps its members hidden and has no fixed public lineup. Instead, each song features a different vocalist, making collaboration and the individual character of each track central to the unit’s identity. Kairiki Bear’s production background places Ret Bear within Japan’s VOCALOID-related digital music scene. In anime, the unit performed the Kuro no Shoukanshi opening theme "Atamannaka DEAD END (頭ん中DEAD END)" with 10fu as vocalist. It later performed "Down Timer (ダウンタイマー)" as an opening theme for Tokyo Revengers.