This paper clarifies the green, water and field coverage that reduce the heat island phenomena and the road coverage that accelerates the heat island phenomena for 41 cities in Japan. However the green coverage ratios in the cities near the mountains and green space are from 20 to 45%, those in the cities with a few parks are less than 5%. The water coverage ratios in the coastal cities are from 20 to 45%. On the other hand, they are about 3% in the inland cities. The populous cities have little field coverage. The road coverage ratios are within the range from 5 to 12%.