The relationship between wider-area municipal spheres and regional urban systems in Japan
(Morikawa, 1990), a municipality qualifies as a central city if the workers of at least 3,000 persons are engaged in sales and service job of the city. The writer examined the spatial relationships between WAMSs (wider-area municipal spheres) and urban
In this paper the writer tries to analyze urban tributary areas and daily city regions of central cities according to the analysis of connectivity between central cities and their surrounding municipalities by using commuting data among
municipalities (1985 Census). Instead of the concept of a city region the writer uses the concepts of a daily city region corresponding to the commuting areas of a central city and an urban tributary area consisting of a wider area. As shown in another paper