Ryokuoushoku Shakai (緑黄色社会) is a 4-piece Japanese pop band signed to Here,play pop! Record Label. Their name is often abbreviated as Ryokushaka (リョクシャカ). Ryokuoshoku Shakai was formed via four friends, three of which were classmates, in Aichi, Japan. They started their activities in 2012. In 2013, they came in second place during the SCHOOL OF LOCK x Sonymusic 10dai Ongaku Festival "Senkou Riot". Since then, they have released three limited venue singles and two mini-albums via Tower Records