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The role of Airport during and after large earthquake is important as assist emergency medical service, stating special operation for transporting living necessities for suffers' daily life immediately and restarting commercial logistic operation to support the activities of the enterprises located around the airport. Full-scale experiment using controlled blasting was conducted in the Ishikari Bay New Port (Ishikariwan-shinko) in Hokkaido Island, Japan, to assess the performance of airport facilities subjected to the liquefaction. Airport facilities in this study included runway pavement with full specifications for B747 aircraft and apron pavement with/without countermeasures for liquefaction, air traffic control facilities such as the Glide Slope Antenna, the Localizer Antenna, drainage conduit and etc. This paper presents that the earthquake resistance improvement strategy and some of the test results while the measurement and investigation are progressing now.