Mitsubishi Estates, one of Japan’s largest real estate companies, has created a comprehensive plan for the downtown business district of Otemachi-Marunouchi-Yurakucho, where it owns one third of the land.
Mitsubishi Estates’ size and ecological principles lead the company to think beyond the scale of individual buildings. District heating, cooling and hot water systems provide energy efficiency for 65 buildings. Rooftop greening lowered summer temperatures 25 degrees celsius compared with concrete slab roofs, mitigating the heat island effect. Other efforts to lower the summer temperatures include sidewalk sprinklers, street trees, vertical gardens, and permeable sidewalks and roadways.
I am impressed that Mitsubishi Estates is not only improving the environment and efficiency of its own buildings, but taking a leading role in improving the city’s environment. Working on the district level, Mitsubishi Estates relates their greening efforts to a larger goal of using their district to connect cooler breezes from Tokyo Bay across the office towers and into the Imperial Palace grounds and other parts of central Tokyo.
- Mitsubishi Estates Creating Communities Known for Their Environmental Harmony (pdf 1.1 MB)