We have presented a formula for calculation of annual fixed amount of CO2 per tree by measuring the growth of urban trees. Based on the satellite data, we have also developed a technique to estimate the fixed amount of CO2 by assessing the quantitative fluctuation of urban greenery.

We have investigated the techniques to maintain the roadside green, aiming to promote diversity in the regional development, as well as to preserve and generate beautiful and comfortable environment. Besides maintenance techniques to cope with problems such as fallen trees and lifted roots, we have developed diagnostic techniques using gamma rays to find out rotten roadside trees.

We are involved with planning of ecological networks which fit in with the wildlife habitat, as well as development of statistical models to estimate impact of environmental changes. Also we are engaged in the development of greenery technologies to promote use of native species and methods to control invasion of alien species.

We have developed integrated preservation systems of satoyama* woodland, and a landscape master plan which responds to population decline and urban degeneration. (Satoyama: undeveloped woodland near populated area.)

We provide technical support to environmental impact assessment, including development of a system to estimate the impact which construction projects have on the rare accipitral species.

We have studied systems, schemes and norms which enable public works to realize good landscape/cityscape.

In an effort to promote town planning which makes the most of historic and cultural resources, we have conducted research on the conservation, utilization and restoration of those elements which constitute historical townscape. Also we have studied techniques to preserve historical townscape under disastrous conditions.