This Passenger Terminal Building (PTB) forms the core of Kansai International Airport, constructed on a man-made island five kilometers off-shore in Osaka Bay and opened in September 1994 as Japan's first 24-hour operable airport. Numerous planning and design issues had to be solved to realize this 1.7 kilometer long PTB under a single huge roof, creating a large interior complex integrating all architectural, structural and utility system elements. The project was completed successfully overcoming the innumerable problems posed by the necessity to prevent undue settlement of the extremely premature man-made island; to provide means for 24-hour airport operation, proper disaster prevention planning, project planning and construction coordination of the international enterprise; and to provide maritime transport, all within a minimal construction time.