
At Seibu Group, we strive for vigorous, sustainable growth for both society and our company by devising solutions to the challenges of forming a sustainable society through a wide range of business and services we operate based on the “group vision” action plan for every employee in our group. We call these efforts to realize a sustainable society “sustainability actions,” and every company in our group is working to achieve sustainable growth.
Here is an introduction to Hakone Yunohana Prince Hotel’s sustainability actions to realize a more sustainable society.
Kanagawa’s first binary-cycle power installation
Binary-cycle power generation is a method that uses steam heat (136°C) to vaporize a chlorofluorocarbon alternative with a low boiling point (15°C). The resulting vapor drives a turbine that produces electricity. It is a clean energy solution that emits no CO₂ by harnessing thermal energy.


At Hakone Yunohana Prince Hotel, we use green energy from hot spring heat for cooling, heating and hot water supply. By adding a binary-cycle power generation facility, we can optimize the use of hot spring heat and supply about 20% of the electricity we consume at the Hotel. These initiatives will lower our annual CO₂ emissions by about 187t-CO₂ (equivalent to about 21.3ha of forest land), and slash our CO₂ footprint by 63%.

We have introduced and operate battery-powered golf carts instead of gasoline-driven carts.