The authors make some improvements on observed environmental indicators system based on residents' evaluation which was developed for Kawasaki so that they can estimate time variation of environmental amenity evaluated by present residents, The improved indicators system shows that variation from 1980 to 85 of the indices of first class residential area with most strict land use regulation differs from those of the other classes with less strict regulation. They conclude that these differences stem from direct land use control as well as upper bound restriction of floor space to site area ratio.
