This paper examines an impact when a limitation on floor-area-ratio (FAR) is increased in suburban housing district. To this purpose, an empirical analysis, with land price change after floor-area-ratio in suburban Tokyo had been extensively increased in 2004, is suggested. Land price change around increased floor-area-ratio area is examined by OLS, and the result shows that there is external diseconomy within 150 meters from increased floor-area-ratio area in the district. It is also proved that the land price drops approximately 4.8 percent more in such points. However, the net benefit of increasing floor-area-ratio is positive if the area is large enough, since enlarged floor has more value than external diseconomy.

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This paper clarifies roles of the community facility adjacent to the small-scale multi-functional care facility for elderly people in Omuta city. After describing outlines of eleven community facilities in Omuta city, this paper takes up case studies on the two contrasting facilities, one is very active in its support activities for elderly people, and the other one is not so active. On the basis of the detailed interviews and questionnaires, it is made clear that the differences between two facilities derived from the mutual relationships between the facility and its local community.

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Deregulation of Floor-Area Ratio (FAR) of office buildings in the center of a metropolis expands agglomeration economies. On the other hand, one of the main objectives of the FAR regulations is to manage road traffic demand because of the time loss caused by road traffic congestion. This study sets up the hypothesis that supply of large office buildings improves externalities of accumulation and provides the increase in short-range trips, promoting the use of the alternative mode of transportation to automobiles. The empirical results suggest that the benefit of accessibility to office buildings which extend 50,000 m2 and more in floor space is greater than those less. And at the same time, the supply of office buildings larger than 50,000 m2 in floor space increases the amount of trip made by an office employee as total. In terms of different mode of transportation, this also reduces the amount of trip by automobile, while it increases the amount of walking trip and railway trip.

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