
Roppongi Hills was opened in April, 2003 and Roppongi Energy Service Co., Ltd. was established as a provider of electricity and steam to cover the building, hotel, residences.

In the basement of Roppongi Hills, 6units of IM400IHI-FLECS cogeneration system were installed by IHI.
This system is usually operated by natural gas but it can also be operated by Kerosene in the case of emergency.(Dual Fuel)
IM400
(Rolls-Royce 501KH5)
| Type: | IM400 IHI-FLECS×6 |
|---|---|
| Total Power Output: | 36,540kW |
| Fuel: | City Gas/Kerosene |
| Operating Start | 2003 |