The Sakamoto Hospital New Main Building, completed in 1977 in Higashi-Osaka, represents a significant example of late twentieth-century Japanese medical architecture. Designed by Seiji Nishimura and the Architectural Environment Research Institute, this facility exemplifies the modernist principles applied to healthcare design during Japan's period of rapid institutional expansion. The building harmonizes functional hospital requirements with contemporary architectural sensibilities, serving as both a medical facility and welfare center. Its design reflects the era's commitment to creating efficient, purpose-built structures that prioritized patient care environments while maintaining architectural integrity. The building remains an important reference point for understanding Japanese healthcare facility design from this pivotal decade.