The Hikari real estate project, the new symbol of Lyon’s commitment to sustainable development, is scheduled for delivery this summer.

Designed by Japanese architect Kengo Kuma, this real estate complex is the fruit of a partnership between Bouygues Immobilier SLC, Lyon Metropole, Nedo (a Japanese public agency) and Toshiba.

Hikari, which means “light” in Japanese, was designed to produce more energy than it will consume, i.e. the building will consume 1,400 MWh of energy and produce 0.2% more energy. These performances are achieved through the use of innovative technologies and a bioclimatic architecture that enable it to optimize natural light in order to keep consumption extremely low. Hikari is expected to consume up to 60% less than levels established by current heating regulations.


With a total floor area of nearly 13,000 sq. m., the real estate complex is composed of 3 buildings:

  • Higashi(“East” in Japanese): an office building with 5,500 sq. m. of floor space
  • Minami(“South”): a residential building with 3,400 sq. m. of floor space
  • Nishi(“West”): a mixed-use building composed of offices (2,600 sq. m.), 4 rooftop villas (700 sq. m.), and 1,000 sq. m. of ground-floor shops and services at the 3 buildings

The buildings will be supplied with 3 sources of renewable energy:

  • photovoltaic panels that will enable production of energy equivalent to that consumed by around 160 households
  • a geothermal system
  • a cogeneration unit that runs on rapeseed fuel from the Rhône-Alpes area.

With this project, Lyon-Confluence is pushing its experimentation with cleantech even further. Showcased during the Climate and Territories World Summit held in Lyon at the beginning of July 2015, the neighborhood serves as an example of urban regeneration pursuing targets in the areas of town planning, economic growth and sustainable development.