Kansai International Airport was constructed as a marine airport 5km offshore in Osaka bay so as not to burden urban dwellers with noise pollution. The second phase construction works are being performed even farther offshore than the first phase. To reclaim land over vast area and complete the island in a short period of time, maximum use is being made of the experience accumulated during the first phase construction works. And by introducing the latest technology and careful planning to procure the large quantity of materials and equipment required, construction works are proceeding in a smooth and efficient manner. This report shows an overview of the construction works of the second phase construction project of Kansai International Airport.