The Badan Penyelidik Usaha-Usaha Persiapan Kemerdekaan Indonesia (BPUPKI), or the Preparatory Committee for Indonesian Independence, played a vital role in shaping Indonesia's independence. While the committee comprised many members, a core group of 9 individuals held significant influence in the decision-making process. This article highlights those nine key figures, their backgrounds, and their contributions to the foundation of Indonesia.