Social benefits of urban green space functions in private redevelopment sites in Tokyo’s 23 wards

The purpose of this study is to evaluate the value of the multifunctionality of urban green spaces in private redevelopment sites. A questionnaire survey was conducted with residents of Tokyo’s 23 wards. The study compared the value of eight functions of green space in private redevelopment sites based on residents’ willingness to pay, using the Contingent Valuation Method. The functions that residents highly valued were “evacuation site,” “disaster prevention and mitigation,” and “environmental control.” Next, the function of providing habitats for living organisms was positively evaluated. On the other hand, functions such as “landscape”, “seasonal awareness”, “space for activities”, and “physical and mental health” were evaluated as being below the median. This study analyzed the relationships among residents’ attributes, their usage of green space in private redevelopment sites, and willingness to pay, using logistic regression analysis. Factors such as “offered price,” “frequency of use of green space in private redevelopment sites,” “nature experiences in childhood,” “willingness to provide nature experiences to their children,” “age,” and “household income” were related to the values associated with the eight functions of green space.