This study quantified the mitigation effect of urban greening on an urban heat island and its effects on energy consumption for air-conditioning and water heating. A scenario of urban greening was defined by assuming that the fractional vegetation cover in the Tokyo Metropolitan Area could be increased by 11.8%. Urban climate simulations were conducted using a mesoscale meteorological model and the energy consumption of air-conditioning and water heating was estimated based on the simulated air temperatures. The energy consumption decreased by 13.8TJ/day on a typical summer day, and increased by 6.7TJ/day on a typical winter day.
