The hardcore band 9991 (pronounced as “Kyuu-Kyuu-Kyu-Ichi”) is known for their intense performances and raw sound within Japan’s hardcore and punk scene. This Tokyo-based group, active at venues like Shibuya LUSH, combines hardcore and sludge elements, bringing an aggressive energy to their live shows. Led by vocalist Sena, with Hachisu on guitar, Erika on second guitar, Haru on drums, and The Ⓜ︎isaline on bass, the band stands out for creating a powerful and unfiltered atmosphere in the moshpit.