This chapter analyses government support policies as an important contextual factor for startup ecosystem development in East Asia. Historically, policies have been crafted to address specific national conditions: for example, Japan’s rigid institutional boundaries and aging society, Korea’s chaebol-dominated industrial structure, and China’s reliance on state-led technology transfers. While differing in tools and emphasis, governments have implemented comprehensive measures to foster startup ecosystems, including regulatory sandboxes in Japan, hybrid venture capital programmes like Korea’s Tech Incubator Program for Startups, and China’s mass entrepreneurship campaigns. These interventions represent either a continuation (China) or a revival (Japan and Korea) of developmental state policies. As a consequence, entrepreneurship has become firmly integrated into the broader economic strategies of the three countries.