Abstract
This paper aims at discussing the relationships between sea route network and tourism demand with network analysis technique in Nagasaki prefecture which have a lot of island regions in Japan. Although tourism is one of key sector for regional economy in these regions, accessibility is a significant agenda for their development. At first, this paper shows the spatial structure of sea route network by measuring the centrality. The high centrality value is obtained in Fukue, Nakadori and Ojika islands while Sasebo city also acquired the highest value in urban region in the sea route network. Then correlation analysis between the value of centrality and tourism demand is carried out. The analyzing shows the medium correlations between them. From these, the linkage of outer islands would be significant view for tourism development in island regions of Nagasaki, as well as single development in one island.
