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Expressways in Japan were built along with the rise of the automobile, and they now span 8,776 km nationwide. Previously, the frequently discussed impact of expressways was underpinning logistics for manufacturing and other industries. In recent years, various other impacts of expressways have gained prominence, including their roles in facilitating medical transportation in emergencies, serving as evacuation routes during times of disaster, and stimulating tourism. Among these impacts, there are high hopes for tourism as a means of regional revitalization as local communities incorporate the vitality of urban areas, especially in mountainous and peninsular regions. This paper estimates the quantitative economic impact of expressways on regional areas via the stimulation of tourism and considers the contributions of expressways to tourism.