Environment Initiatives

Increasing Greenery and Biodiversity

Increasing Greenery and Biodiversity

Policy and Approach

While human livelihood and corporate activity is supported by the various blessings of nature, today, the planet’s green environment and biodiversity are rapidly slipping away.

Efforts to maintain greenery and biodiversity will allow us to sustain the blessings of nature for future generations. In terms of the Investment Corporation’s business activities, this will be expressed as providing our tenants with comfortable office and residential spaces that are in tune with nature. This leads to enhanced competitiveness of our portfolio.

MHR and MIM will create surface microenvironments where humans live in harmony with nature and shall provide spaces that excel in biodiversity and are rich in vibrant greenery. We will also foster people’s environmental communities through these spaces.

Promotion of Greenery

MHR aims to increase the "green ratio" by proactively undertaking the landscaping of open spaces and rooftops.

Green Ratio of Major Development Projects (2023)
Name Completion Green ratio
ARK Hills 1986 41.9%
Atago Green Hills 2001 52.9%
Roppongi Hills 2003 30.7%
Toranomon Hills Mori Tower 2014 30.6%
(Reference) All of Minato-ku  22.6%
Source: Minato City Green Survey (10th Report), issued March 2022

The roof top of Suntory Hall at ARK Hills
The rooftop of Suntory Hall at ARK Hills

Mouri Garden at Roppongi Hills
Mohri Garden at Roppongi Hills


Initiatives for protection of biodiversity are carried out in a systematic manner at all properties owned by MHR.

Toranomon Hills

Realized approximately 6,000 m² of lush green space on artificial ground by utilizing the Multi-Level Road System, a breakthrough system that allowed for the construction of an architectural structure above Ring Road No. 2.
At Toranomon Hills, which acquired AAA (the highest rank) in the JHEP certification (*) for creating a stream and lush greenery in consideration of biodiversity, a diverse environment composed of flowers, plants and trees of native species, water area, etc. has been established and serves as an oasis in the city where seasonal flowers, plants and trees can be enjoyed and as a place for birds and insects to shelter.
* This program quantitatively evaluates and certifies and certifies initiatives contributing to the preservation and restoration of biodiversity. It is developed and operated by the Ecosystem Conservation Society-Japan.

Roppongi Hills

Diverse technologies and ideas are given life in the creation of distinctive greenery. To communicate the history of the land, trees and an Edo period garden were preserved in the development of Mohri Garden.
On the rooftop of Keyakizaka Complex, MB built a rice paddy where local residents can enjoy rice planting and harvesting, and make effective use of the paddy as the necessary weight for a ‘Green Mass Damper’ seismic control system.

Atago Green Hills

Inheriting the rich nature and history of the Seisho-ji Temple and Mt. Atago, Atago Green Hills was born with the aim of creating a network of greenery connecting Shiba Park and other surrounding green areas.
By preserving sloped green areas as much as possible and raising saplings from the seeds of the trees we inherited there, we have sustained the region's vegetation. MB placed green paths along the slopes so people can enjoy nature while minimizing the impact on plants and animals.

ARK Hills

MB created a large-scale rooftop green area at ARK Hills, the private sector's first large-scale redevelopment. MB planted over 40,000 trees in a green area exceeding 20% of the grounds, including the rooftop of Suntory Hall.
The 150 Yoshino cherry trees planted along peripheral roads are now a famed spot for cherry blossom viewing. In 1997, MB planted flowers in year-round green areas, and today continue evolving these into place for feeling the charms of the seasons and interacting with greenery.