The Parasol Dome Kaei Memorial Gymnasium, completed in 1986, stands as a remarkable example of innovative structural design in Tokyo. Designed by Kajima Corporation, this indoor sports facility showcases a distinctive parasol-shaped dome that dominates its architectural presence. Located in Kodaira, the gymnasium serves the educational community as a multi-purpose venue for elementary, junior, and senior high schools. The bold geometric form and engineering excellence reflected in its canopy structure represent a significant contribution to sports architecture of the 1980s, demonstrating how functional design can achieve both aesthetic appeal and structural efficiency.