The main purpose of this paper is to measure and compare the network performance of selected thirteen major airports in Japan. After classifying network connectivity into four -direct, indirect, onward and hub, this paper develops a model (NetScan model), taking into account transfer time and detour time. By quantifying an indirect connection and scaling it into a theoretical direct connection, the network diversity behind direct connections and the competitive position of Japanese major airports are identified. The results reveal that Narita has the remarkable network performance behind its direct connections, especially to North America.

The Tokyo Metropolitan Area has been developing for a long time since early last century. Despite of this, the population census in 2000 reported decrease of daytime population in the Tokyo Special Ward (center of Tokyo Metropolitan Area). Using data from population census in 2005, this article estimates the current trend of daytime population in the Tokyo Special Ward.