Abstract
This study on the ecotours in the national parks of Japan has an important role of not only sightseeing promotion but also environment protection. It aims to clarify the functions of ecotours in national parks through case studies, to make arrangement of the conditions for continuous operation of ecotours, and to suggest the measures for sustainable tourism.
Through the analysis on the development process of cases, it concludes by clarifying the conditions required for continuous tour management, and it suggests the principal measures for treating the issues on secularization and obsolescence occurring in the development process of the ecotours.
