|Tokyo Metropolitan Government has studying its urban parks since 1982. Several parks are selected in each year, and the parks under study are increasing. The cost has already amounted more than 10 million yen. At 69 parks, the government counted the visitors’ number of the monitoring day and interviewed age of visitors, their way of access, purposes of visit, their impressions of the parks and the requirements of the park management. The results were totaled at each park category. The categories were: A, famous park well facilitated; B, city park with wide. grassy open space; C, sports parks; D, natural forest parks in hilly area; E, historic garden parks with admission; and F, small parks. The density of visitors ranged from 1-200 persons per hectare, and 80% of parks had a density below 50 persons per hectare. The inducement sphere, 80% of visitors accessible, was ranged from 1-50km; the widest radius was observed at the parks with admission and the park at the city center. A frequent arrival of the visitors was observed 1-2 p.m. and the exit was 2-3 p.m. at the historical gardens (E type). The parks, less than 20 hectare, showed the increase in visitor numbers in proportion to the park area. B type park showed the increase of residence time in relation to the park area. Congestion had a bipolar effect on visitors’ satisfaction: each park has its own comfortable visitor density.