Environmental-Friendly Measures: Efforts toward environmental considerations
Decarbonization and strengthening disaster resilience
MIRARESI
MIRARTH Holdings and Takara Leben aim to make the disaster-resistant condominium system "MIRARESI," equipped with solar panels and storage batteries, standard on all New built-for-sale condominium properties, including the condominium brand "LEBEN LEBEN" and the urban compact condominium "NEBEL" series ※。
"MIRARESI" is a next-generation resilience system designed to reduce household financial burdens by utilizing renewable energy generated from solar panels installed in condominiums, and in the event of a disaster, to operate water supply pumps powered by batteries for disaster preparedness, thereby ensuring water and electricity and maintaining residents' quality of life.
- *Excludes properties in heavy snowfall areas, special heavy snowfall areas, joint venture properties, redevelopment projects, and properties that do not meet certain conditions.
Renewable energy-based apartment service
Takara Leben and FamilyNet Japan Inc., a member of the Tokyo Electric Power Group, have signed a business partnership agreement for "Takara Leben with CYBERHOME," an internet service and energy-related service aimed at Realizing a Decarbonized Society.
Additionally, as a solar power service introduced in this service, Takara Leben and TEPCO Energy Partner Co., Ltd. have signed a "Basic Agreement on the Introduction of EneCali Plus." Enekari Plus is a solar power service provided by Tokyo Electric Power Energy Partner, allowing residents to install solar power equipment with zero initial cost and to use the electricity generated at a fixed monthly rate.
Takara Leben with CYBERHOME offers customized energy services tailored to the characteristics of the apartments Takara Leben sell, including internet connectivity, bulk power reception for condominiums using renewable energy, power supply to common areas, gas supply, and green power certificates. Furthermore, by introducing Enekari Plus into this service, you can use renewable energy power in common areas of condominiums and also utilize solar power even during power outages.
Through collaboration among Takara Leben, FamilyNet Japan, and Tokyo Electric Power Energy Partners, we have realized condominium services that contribute to decarbonization through increased product value and expansion of renewable energy, while keeping installation costs for internet and energy service equipment and various service usage fees low.
Supply of renewable energy to managed condominiums
MIRARTH HOLDINGS Group is working to supply electricity generated at renewable energy power plants owned by MIRARTH Energy Solutions to the common areas of the high-grade rental apartment complex "LUXENA," operated and managed by Leben Trust. By utilizing a specified wholesale supply scheme, we established a system that delivers 100% renewable energy electricity directly from MIRARTH Energy Solutions power plants to Leben Trust-managed properties through retail electricity providers. Since August 2025, we have been gradually implementing this system, realizing an energy circulation model where clean electricity generated within the group is consumed at group-managed properties.
This collaboration will not only contribute to a decarbonized society but also enhance the added value of environmentally friendly condominiums. It will lead to increased asset value for properties and stronger appeal to environmentally conscious residents, and we plan to further expand the number of properties covered in the future.
Solar power generation systems are standard equipment in detached houses for sale.
Leben Home Build offers the service "MIRATH Smile Roof (tentative)," which installs solar power generation systems as standard in newly built detached houses in Tokyo.
This service utilizes the "Smile Roof" service provided by Osaka Gas Co., Ltd., allowing you to install a solar power generation system with zero initial cost *2. The electricity generated is preferentially supplied to your home, reducing the amount you need from your utility. Additionally, it contributes to disaster prevention measures by lowering CO₂ emissions and providing emergency power during power outages caused by natural disasters.
Going forward, we will also consider standardizing this service for properties supplied by prefectures and municipalities outside Tokyo.
- *1 "Smile Roof" is the name of the zero-cost initial installation service for solar power generation provided by Osaka Gas Co., Ltd.. A service contract requires a contract between the customer and Osaka Gas. By paying a monthly service fee, you can use electricity generated by solar power facilities within your home. After the 10-year service period ends, the electricity sales income will belong to the customer.
- *2 Installation costs within the scope of standard construction for new buildings are free of charge. Installation of power generation monitors and use of materials outside of standard construction will incur additional charges.
Special Award Winner in the "Chiyoda Ward Climate Change Action Plan System"
Our company received a "Special Award" in the "Chiyoda Ward Global Warming Consideration Action Plan System" for fiscal year 2025.
The Chiyoda Ward Global Warming Awareness Action Plan System is a program designed to promote and disseminate global warming awareness actions among businesses within Chiyoda Ward, in order to realize Chiyoda Ward's goal of "2050 Zero Carbon Chiyoda (a decarbonized society)." Every year, the ward recognizes particularly outstanding initiatives from among the implementation status and plans of "environmental activities," "environmental education," and "community contribution activities" reported to the ward, awarding them with four prizes: the "Chiyoda Ward Global Warming Awareness Award (mandatory submission category/optional submission category)," the "Community Contribution Award," and the "Special Award." The selection process evaluates initiatives from perspectives such as "innovativeness," "originality," "ripple effect," "adaptability to the region," and "social contribution."
Our company received a "Special Award" in recognition of our efforts to formulate medium- to long-term targets for achieving a decarbonized society by 2050, obtain "SBT certification," and visualize and manage greenhouse gas emissions across the entire group.
Acquisition of low-carbon building certification
Our company and Takara Leben have installed solar panels as standard at all New built-for-sale condominium properties we supply, promoting the introduction of renewable energy. We are working on ZEH (ZEH-M Oriented) and promoting certification for low-carbon buildings.
Low-carbon buildings refer to those constructed within urbanized areas and similar areas where measures have been taken to reduce carbon dioxide emissions generated from daily life and activities.
Going forward, we will continue to aim for homes that contribute to a sustainable future through obtaining this certification.
- *Excludes areas subject to heavy or extreme snowfall.
Introduction of Hydrogen Vehicle MIRAI
当社グループでは、脱炭素社会の実現に向けて、環境負荷の少ない次世代モビリティの導入を進めています。
As part of these efforts, in December 2024, Takara Leben introduced the hydrogen-fueled fuel cell vehicle (FCEV) "MIRAI" (manufactured by Toyota Motor Corporation) as a company-owned vehicle at the Chubu branch. Only one unit is installed, and it is used as a means of transportation for daily operations.
Going forward, the entire group will continue to work to reduce greenhouse gas emissions by introducing clean vehicles that emit no CO₂ while driving.
Achieving Certifications for Managed Properties
MIRARTH Real Estate Advisory and MIRARTH Asset Management actively promote the acquisition of environmental certifications such as DBJ Green Building* and CASBEE at properties for managed properties, as part of our commitment to sustainability in asset management.
- * DBJ Green Building: A program Established by Development Bank of Japan Inc. in April 2011 to evaluates real estate based on environmental and social considerations. Properties are evaluated comprehensively, covering not only environmental performance but also tenant and community engagement, as well as seismic resilience.
Initiatives by MIRARTH Real Estate Advisory
MIRARTH Real Estate Advisory obtained CASBEE certification A rank for fiscal year 2025 at Apita Nagoya Minami Store (Nagoya City, Aichi Prefecture).
Initiatives by MIRARTH Asset Management
MIRARTH Asset Management obtained DBJ Green Building certification in fiscal 2025 for its office building, the Jingumae 123 Building (Shibuya-ku, Tokyo), which demonstrates outstanding environmental and social consideration.
Promotion of LEDs
For the purpose of effective use of resources and reduction of running costs, we are promoting the replacement of lighting installed in managed properties with LED lighting, which has a longer life and consumes less power.
Measures of Leben Trust
Leben Trust, a real estate leasing and management company, actively proposes environmentally friendly capital investments to owners, such as the use of LED lighting in common areas of managed properties, to promote energy conservation in buildings.
Initiatives by MIRARTH Real Estate Advisory
At MIRARTH Real Estate Advisory that manages MIRATH Real Estate Investment Corporation's assets, LED lighting has been installed on 62 properties owned by the corporation.
| Number of properties (including partial installations) |
LED Installation Rate in the Portfolio | ||
|---|---|---|---|
| LED Installation | 62 properties | Total 74.7% | Of which, 91.4% are common areas. |
| Of which, the exclusive-use portion is 65.6% | |||
- *Based on area, as of the end of February 2026
Initiatives in office buildings
Environmental Measures in Office Buildings
At MIRARTH Real Estate Advisory that manages assets under the trust of MIRATH Real Estate Investment Corporation, we promote environmentally conscious initiatives to reduce environmental impact and improve indoor environments.
To reduce water consumption in office buildings, we use rainwater for toilet flushing water, conduct awareness raising activities for tenants, and install "water-saving panels" to reduce the amount of water used in the water supply.
In addition, by displaying educational posters in common areas and tenants' private areas, we are promoting the reduction of greenhouse gas emissions and waste by fostering awareness of electricity conservation and the 3Rs.
Initiatives in condominium management
Regular Cleaning Using Environmentally Friendly Detergents
As part of its commitment to environmental friendliness in condominium management services, Leben Community has officially introduced biodegradable plant-derived surfactants since FY2022.
Although vegetable-based detergents had been introduced on a trial basis at some properties since FY2021, the vegetable-based detergents at that time had less cleaning power than conventional detergents and did not meet the quality required for the services. After a number of trials and errors, we have officially introduced a detergent that does not fall under the PRTR system* and that takes environmental recycling into consideration. Currently, the detergent is used at sites where cleaning and janitorial staff belonging to Leben Community work.
- * PRTR system: A system under which business operators are required to monitor and report to the government the amount of chemical substances released into the environment (air, water, and soil) from their business sites and the amount transferred out of their business sites in waste materials, which may be harmful to human health or the ecosystem.
