Hakodate City merged its four neighboring towns in December 2004. The newly-organized city is pushing ahead with its schemes for regional developments centered on the fishery industry. In order to sustain the fishery production and revitalize the local community, it is considered a significant challenge to operate schemes for improving the fishery and its concerned industries, and the travel industry. This can not only contribute to an increase in the production of fishery and other industries, but also lead to the greater employment opportunities, the promotion of new industries, and the economic revitalization of neighboring communities. This research suggested future plans of Hakodate City and a scenario toward the realization of them, analyzing the direction of the policy of regional revitalization and estimating the economic effects with the use of input-output table, in addition to the suggestion of a possible plan for an efficient infrastructure improvement.