The Japan Self-Defence Forces (JSDF), despite a constitutional clause renouncing war and maintaining armed forces, have become overwhelmingly recognized by the Japanese public for their crucial role in domestic disaster relief. This public trust, consistently highlighted by media portraying the JSDF as heroes, stems from their ardent commitment to humanitarian operations in disaster-prone Japan. The JSDF’s mobilization during the COVID-19 pandemic, under disaster relief orders, exemplified this, with personnel assisting in quarantine, medical support on a cruise ship, and operating large-scale vaccination centers. While highly effective, this increasing reliance on the JSDF for domestic tasks raises concerns among experts inside and outside the JSDF and Ministry of Defence. Critics question if such deployments always adhere to the principle of being a last resort when civilian alternatives are unavailable, potentially overburdening the forces and compromising their primary defence capabilities in a rapidly evolving East Asian security landscape. Despite these concerns, the JSDF’s unwavering dedication to disaster relief continues to foster strong public trust, demonstrating a unique civil-military relationship in Japan.