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Climate Change Strategies

Basic Policy and Approach

The damage to human life and property caused by extreme weather events such as localized heavy rain is becoming more serious each year.

The real estate industry is known to emit a particularly large proportion of greenhouse gases as a percentage of all industries. The Mitsubishi Estate Group, which owns a large number of properties in and outside Japan, recognizes it has a great responsibility, and considers it essential to address climate change in order to achieve the Mission of Mitsubishi Estate Group, which is to contribute to society through urban development.

It is against this backdrop that, in order to identify the impact of climate change on business activities and take appropriate actions, the Group endorsed the TCFD Recommendations in February 2020 and implemented analysis and information disclosure*1 in line with the TCFD information disclosure framework (governance, strategy, risk management, and metrics and targets around climate-related risks and opportunities). Based on the results of this analysis, the Group will further strengthen its governance and business strategies related to climate change in order to appropriately manage and respond to climate-related transition risks (including regulatory, technological, market, and reputation risks) and physical risks (acute and chronic risks).

Moreover, collaboration with a broad range of external stakeholders is essential for the Group as it implements initiatives aimed at realizing a carbon-free society. To this end, Mitsubishi Estate has joined the Japan Climate Leaders' Partnership (JCLP)*2, a coalition of companies acting against the climate crisis, and working to collaborate with other companies to enact policy proposals to the government with the aim of decarbonization.
The Mitsubishi Estate Group will respond steadily to climate change by deepening the initiatives it takes through its business activities in line with this basic policy and approach.

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Goals and Achievement Status



Under the basic policy and approach described above, the Mitsubishi Estate Group has formulated medium-to-long term reduction targets for the Group's overall greenhouse gas emissions (reductions in GHG emissions [Scope 1 + 2 + 3] of 35% by fiscal 2030 and 87% by fiscal 2050 compared with fiscal 2017. In April 2019, these targets were approved as being based on scientific evidence by the Science Based Targets (SBT) initiative. In February 2022, the Group revised its targets in line with the Net-Zero Standard published by the SBTi in October 2021 based on its 1.5°C scenarios (in the process of applying to the SBTi for approval as of March 31, 2022).

GHG Emissions Reduction Targets after Revision in February 2022
(in the process of SBTi application as of March 31, 2022)

  • Reduce Scope 1 + 2 by 70% or more and Scope 3 by 50% or more by fiscal 2030 compared to fiscal 2019 emissions
  • Achieve net-zero emissions by 2050 (reduce Scope 1, 2, and 3 by 90% or more. Neutralize residual emissions*)
  • Emissions that remain unabated within the value chain in the target year are termed “residual emissions.” The SBTi standard requires neutralizing any residual emissions using forest absorption and carbon removal technologies outside the value chain to counterbalance the impact of these unabated emissions and to achieve net-zero emissions.

In January 2020, Mitsubishi Estate made a commitment to switching to renewable energy for 100% of the electricity it uses and joined RE100, a global collaborative initiative aimed at switching to electricity derived from renewable energy for 100% of the electricity used in business. In February 2022, Mitsubishi Estate revised its GHG reduction targets in line with the SBTi’s Net-Zero Standard and, in conjunction with these revisions, also renewed the Group’s renewable energy rate target to achieve 100% group-wide by fiscal 2025.

Achievement Status

In order to achieve the targets above, the Group is implementing measures such as the use of high-efficiency equipment in the operation of office buildings, which is the Group's core business. In addition, given that factors such as external temperature and building operating conditions impact energy usage, we work with tenants to conserve energy and reduce GHG emissions. Moreover, we are switching the electricity used in buildings to electricity sourced from renewable energy, thereby reducing GHG emissions (Scope 2) and increasing the percentage of renewable power.

In fiscal 2021, Mitsubishi Estate introduced renewable power in 18 buildings in the Otemachi, Marunouchi, Yurakucho area, where the company owns and operates many buildings, as well as one in Yokohama area (The Landmark Tower Yokohama) and another in the Chubu area (Dai Nagoya Building). It plans to introduce renewable power to all the buildings* it owns and operates in the Tokyo metroplos and the Yokohama area in fiscal 2022. The 2021 and 2022 introductions are expected to increase renewable energy rate to around 30% and 50%, respectively, achieving the previously stated interim target of 25% by 2030, well ahead of schedule.

The company is also installing solar power facilities at its distribution facilities and the Group's outlet malls to promote the use of sustainable energy and reduce GHG emissions.

  • Office buildings and commercial complexes in which the Mitsubishi Estate Group has at least a 50% equity interest, excluding the capital recycling business and properties scheduled for redevelopment, etc.

See the following for data on GHG emissions and the ratio of renewable power.

ESG Data > Environmental data

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Energy Management Initiatives

Introducing "Super Tube" to Enhance District Heating-Cooling and Cogeneration Systems

Since Marunouchi Heat Supply began operating in 1976, it has developed a district heating-cooling network in the Otemachi, Marunouchi, Yurakucho area and supported energy management for the entire area. The steam and cold water generated by its plants are supplied to buildings through underground tunnels and used for air conditioning. Most of the buildings the Group owns in this area benefit from this system.

At the end of December 2020, Marunouchi Heat Supply and Mitsubishi Estate completed the "Super Tube," a 250-meter long culvert running north to south along Marunouchi Naka-Dori Avenue, and began supplying energy via this tunnel the following January. The Super Tube, which is 30 meters underground, is highly earthquake-resistant and the heat supply pipes inside it form an arterial network that will underpin the stable supply of energy in the Otemachi, Marunouchi, Yurakucho area. The supply of heat generated by the high-efficiency equipment at the Marunouchi Nijubashi Building plant through the Super Tube will reduce CO2 emissions and increase energy efficiency in the Yurakucho district.

With the construction of the Super Tube, the steam network linking the Marunouchi 1-chome, Marunouchi 2-chome, and the Yurakucho districts is now complete, and the mutual backup function between plants in an emergency has also been strengthened. Moreover, the effective use of unused heat is being promoted through the supply of exhaust heat generated by the cogeneration system to multiple buildings in the area through the steam network.

Formulation of Smart Energy Urban Development Action 2050

In March 2021, Mitsubishi Estate and Marunouchi Heat Supply formulated Smart Energy Urban Development Action 2050, concentrating on the Otemachi, Marunouchi, Yurakucho area. The two companies will work on symbiotic and comprehensive energy policies that fully capitalize their management resources with the aim of next-generation urban development to maximize both environmental value and socioeconomic activity.

Central to Smart Energy Urban Development Action 2050 is the realization of an urban microgrid that will contribute to energy resilience, climate change countermeasures, and decarbonization in this area. The urban microgrid is a concept that integrates the use of self-owned power sources and renewable energy, which will be proactively brought in from outside. It also makes it possible to improve the efficiency of heat and power supply while making building energy consumption more efficient and smarter by maximizing the use of the district heating-cooling system. The creation of an urban microgrid contributes to climate change countermeasures and decarbonization during normal times, while also ensuring energy resilience to support business continuity in the area in the event of a major earthquake and other emergencies, thereby maximizing socioeconomic activity of this central business district.

In order to realize the urban microgrid, Energy and Urban Development Action 2050 sets out three management strategies. These consist of (1) Supply management strategy: improving overall efficiency through integrated heat and power supply system and decarbonization of electricity and heat; (2) Supply and demand management strategy: improving energy management efficiency through smarter energy consumption in new and existing buildings; and (3) Linkage and business management strategy: participating in renewable energy projects and contributing to regional revitalization, collaborating with diverse energy businesses on verification. Measures will be implemented in these three directions. In addition, the Urban Energy Strategy Planning Department was established at Mitsubishi Estate on April 1, 2021, as the organization for implementing the measures and promoting studies in this area.

Outline of the Strategies

(1) Supply Management Strategy
Decarbonization of electricity (proactive introduction of renewable energy) We will proactively introduce renewable energy in order to drive decarbonization of electricity.
Decarbonization of heat and construction of optimum energy portfolio Together with optimizing the combined heat and power portfolio, we will promote decarbonization of heat, which will contribute to the overall portfolio.
Business continuity based on integrated heat and power and self-owned power sources; enhanced efficiency through area supply control In addition to building a system that can supply each building with heat and electricity in an integrated manner, we will establish an autonomous emergency system through the ownership and operation of self-sustainng power sources and further improve efficiency in normal times through area supply control.
Area supply management and load levelling control using demand response*1, heat and power storage, and VPP*2, etc. We will build systems that will manage heat and power supply within the area effectively, including coordinated supply among buildings and time band leveling, utililizing demand response, power and heat storage, VPP and other methods.

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  • Demand response: refers to changing power demand patterns by controlling energy usage volume on the energy consumer side
  • Virtual Power Plant (VPP): A cloud-based distributed power plant that uses information technology to aggregate the capacities of different distributed energy resources and function as if it were a physical power plant
(2) Supply and Demand Management Strategy
An approach with long-term building stock in mind We will manage from the perspective of the future building portfolio with an eye on the long-term rebuilding schedule in the area.
Making newly developed buildings emissions-free For buildings developed in the future, we will study measures that contribute to maximizing energy conservation performance and make buildings emissions-free.
Improvement of energy consumption efficiency in existing buildings We will make effectively timed investments that contribute to greater energy conservation and smarter building design and operation with an eye on the repair life cycle of existing buildings.
Upgrading of management through "BENI," an independently developed next-generation cloud-based BEMS platform We are developing our own next-generation cloud-based building and energy management system (BEMS) that will contibute to improving the operational efficiency of the diverse parties involved in building operation, as well as visualizing and providing an overall picture for energy conservation activities.
Demand-side load management using demand response and power and heat storage, etc. We will engage in energy demand-side load management using demand response, power and heat storage, and other methods to encourage more efficient energy use.

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(3) Linkage and Business Management Strategy
Participation in renewable energy business and contribution to regional revitalization In addition to participating in renewable energy projects across Japan, we will contribute to regional revitalization and local community development that helps to promote industry and create jobs in varied regions.
Development of cocreation with energy businesses We will develop relationships for cocreation that go beyond business transactions as an energy consumer with businesses in energy-related fields, including power generation, transmission and distribution, electricity retail, gas supply, and aggregator business.
Promotion of collaborative verification and R&D in the Marunouchi area We will provide our assets in the area as demonstration fields for the implementation and verification of new technologies, thereby contributing to their establishment.

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Entry into the Biomass Power Generation Business

In May 2021, Mitsubishi Estate, Shizuoka Gas & Power Co., Ltd. K.K., and PROSPEC AZ Inc. established Higashi Matsuyama Biomass Power Generation, LLC, a joint venture company, marking Mitsubishi Estate's first foray into the biomass power generation business. The joint venture company will develop a biomass power generation plant with a power generation capacity of 1,990 kW in Higashi Matsuyama, Saitama Prefecture, at which it plans to commence operations in fiscal 2023. This business is a local closed-loop renewable energy power generation business that reuses wood materials from pruning urban waste matter, including roadside trees and trees in parks, as fuel. We expect the plant to generate approximately 15.0 GWh annually (equivalent to power for 4,800 households) and achieve CO2 emission reductions of approximately 6,900 tons per year.

In light of calls for achieving a decarbonized society and the rapidly rising interest in renewable energy in Japan and overseas, we plan to continue developing biomass power generation businesses throughout Japan at a rate of two or three per year. Through these efforts, we aim to realize a sustainable society (social value improvement) by contributing to the popularization of renewable energy.

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Promoting Renewable Energy

Promoting Use of Renewable Power in Buildings

In achieving its medium-to-long term targets (SBTs) for greenhouse gas emissions reductions and the target for the ratio of renewable power (RE100), the Mitsubishi Estate Group believes that it is imperative to switch the electricity used in the buildings it owns and operates to electricity derived from renewable energy. Based on this recognition, the Group is steadily implementing a switch to renewable power.

In fiscal 2021, Mitsubishi Estate will switch to renewable power for all the electricity used in 18 buildings in the Marunouchi area (the Otemachi, Marunouchi, and Yurakucho districts), as well as in the Landmark Tower Yokohama and Dai Nagoya Building, including the electricity used by tenants. Further, in fiscal 2022, renewable power will be introduced in all the buildings it owns and operates in the Marunouchi area. Going forward, the company also plans to actively introduce renewable power in other areas.

See the following for the list of buildings to introduce renewable energy.

List of Buildings to Introduce Renewable Energy

Promoting Use of Renewable Power in Logistics Facilities

Logicross Ebina Completed November 2020

Mitsubishi Estate is working to install solar panels on the roof space of the Logicross series of logistics facilities it develops where such installations are possible. At Logicross Ebina, completed in November 2020, the initiative uses the PPA* model.

  • Power Purchase Agreement = a third-party ownership model for self-consumption solar power generation facilities

Promoting Use of Renewable Energy at Premium Outlets®

Shisui Premium Outlet's carport-type solar power generator for captive consumption

Mitsubishi Estate • Simon, which operates Premium Outlets®, is working to develop facilities with an awareness of energy conservation. In February 2016, the company introduced carport-type solar power generators for captive consumption with generating capacity of 1 megawatt at its Ami Premium Outlet. This was followed by the installation of the same kind of facility at the Shisui Premium Outlet in December 2017.

The company also started purchasing green energy certificates in April 2016, as part of its initiative to contribute to more widespread use and expansion of renewable energy.

Investment in Venture Company Aimed at Commercialization of New Hydrogen Energy

Contributing to environment- and people-friendly urban development through high-efficiency clean energy

Mitsubishi Estate has been promoting the development of low-carbon cities through the development and operation of buildings with high energy-saving performance and district heating and cooling projects. Moving forward, we believe that in order to achieve the CO2 emissions reduction targets for the entire Mitsubishi Estate Group and realize an even lower carbon society, it is necessary to expand the use of green energy that does not emit CO2 in addition to the energy-saving initiatives implemented so far.

Therefore, in January 2019, Mitsubishi Estate invested in Clean Planet Inc., a venture company involved in pioneering innovation in the energy sector. Clean Planet has developed a new hydrogen energy technology, in which the energy output per unit of hydrogen is far greater than conventional hydrogen energy. Mitsubishi Estate and Clean Planet will work together to commercialize new hydrogen energy with a goal of reducing the cost of electricity to one tenth of the current level. We will contribute to creating the foundation for the sustainable decarbonized society set out in the Paris Accord by expanding the use of this clean new hydrogen energy worldwide.

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Working Together with Tenants

Organizing Global Warning Prevention Council Meetings

Mitsubishi Estate has been organizing yearly Global Warming Prevention Council meetings since 2008, collaborating with the tenants in its buildings. The Council meetings are convened for an explanation of CO2 emission reduction and energy-saving initiatives, based on the Tokyo Metropolitan Environmental Security Ordinance and the Energy Saving Act, and to provide updates on their progress. Mitsubishi Estate will continue this initiative to provide tenants with information on energy-saving activities underway in the building, their concrete reduction targets, and energy-saving methods that can thereby promote energy-saving activities together with its tenants.

Publication of the Sustainability Guide

Since fiscal 2019, Mitsubishi Estate and Japan Real Estate Asset Management have jointly published the Sustainability Guide, which is distributed to office tenants with support from Mitsubishi Jisho Property Management.

In order to realize the sustainable urban development and contribution to the SDGs set out by the Mitsubishi Estate Group, it is necessary to collaborate with all stakeholders involved in urban development and build cooperative relationships. The guide will primarily be utilized as a communication tool for promoting collaboration with office tenants to help facilitate a sustainable world.

  • Main Topics
    • Sustainability Guide Vol.1 (published 2019) : New office spaces and workstyle reform
    • Sustainability Guide Vol.2 (published 2021) : What an office should be like in the "new normal" era・Recycling waste

Sustainability Guide Vol.1 (published 2019) (PDF 958KB)PDF

Sustainability Guide Vol.2 (published 2021) (PDF 1.34MB)PDF

Green Lease Program Benefits Both Owners and Tenants

Japan Real Estate Asset Management (JRE-AM), which provides asset management services for Japan Real Estate Investment (JRE), has been actively promoting renovations of equipment in building stock aimed at reducing environmental impact. Its aim is to build a portfolio that is highly rated by tenants and investors that prioritize environmental performance of buildings.

In general, building owners are reluctant to introduce environmental equipment renovations because they do not necessarily produce economic benefits commensurate with the investment. In these circumstances, JRE-AM has introduced a Green Lease Program under which a portion of the reduction in energy usage fees received by tenants is returned to building owners for a certain period. Taking advantage of the program, the company has been progressively converting lighting in tenant use areas to LED. This also has the advantage of dramatically reducing electricity fees for tenants, creating a "win-win" benefit for both tenants and building owners.

By expanding the Green Lease Program, JRE-AM will continue to provide value-added, environmentally-friendly real estate that contributes to CO2 reduction.

Establishing New Green Lease Clause

In order to promote energy conservation in collaboration with tenants, Mitsubishi Estate has established a new green lease clause in its lease agreement template.

See the following for the percentages of agreements based on the green lease clause.

ESG Data > E: Environmental data > (2) Other

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Energy Management Initiatives

Promoting the Use of Carbon Neutral City Gas


The Marunouchi Building and Otemachi Park Building began using carbon neutral city gas in March 2020, the first of its kind in Japan. The carbon neutral city gas derives from carbon neutral LNG purchased by Tokyo Gas from Shell Group with Shell Group's carbon credits used to offset the CO2 emissions generated in all processes from exploration to use as fuel.

The carbon neutral city gas is being used in the hybrid power generation system installed in the Marunouchi Building in March 2019 and the gas co-generation system in the district heating and cooling plant in the Otemachi Park Building. As a result, significant reductions in CO2 emissions have been achieved.

Also, with the goal of popularizing carbon neutral LNG and improving its utility value, Tokyo Gas, which procures and supplies carbon neutral LNG, along with four organizations that purchase the gas, established the Carbon Neutral LNG Buyers' Alliance in March 2021. In order to help achieve a carbon neutral society by 2050, alliance member organizations are working to promote carbon neutral LNG around the globe, as well as improve its evaluation by investing institutions, and establish the position of carbon neutral LNG among various domestic systems.

Logistics Facility Logicross Ebina Obtains Nearly ZEB

Logistics facility Logicross Ebina, completed in November 2020, obtained a five-star rating under the Building-housing Energy-efficiency Labeling System (BELS)*1. Thanks to further use of renewable energy, it has been certified as a Nearly ZEB*2 building, which means that its annual primary energy consumption is nearly zero. This is the first property developed by Mitsubishi Estate that has obtained Nearly ZEB certification.

In addition to reduced primary energy consumption on the design facet, a collaborative initiative with renewable energy provider SymEnergy Inc. has implemented the installation of power purchase agreement (PPA) model self-consumption solar power generation equipment on the roof of its facilities, which generates electricity for use inside the property. We believe that the implementation of such a program has resulted in obtaining Nearly ZEB certification.

Going forward, Mitsubishi Estate plans to obtain BELS certification as a general principle for the Logicross series of logistics facilities it develops.

  • Stipulated by the Ministry of Land, Infrastructure, Transport and Tourism, BELS is a building energy efficiency lbeling system where a third-party agency evaluates and certifies the energy-saving performance of newly built or existing buildings.
  • Buildings with annual primary energy consumption of net zero or less. Nearly net-zero-energy buildings are almost on a par with net-zero-energy buildings and satisfy both of the following two criteria in terms of energy consumption: (1) a reduction of more than 50% compared with standard primary energy consumption (excluding renewable energy) and (2) a reduction of more than 75% less than 100% more compared with standard primary energy consumption (including renewable energy)
BELS ZEB - この建物のエネルギー消費量82%削減 2021年2月10日交付 国土交通省告示に基づく第三者認証

Exterior of Logicross Ebina

Taking Measures for a Net Zero Energy Building (ZEB) at Miyako Shimojishima Airport Terminal in Okinawa

Opened in March 2019, the Miyako Shimojishima Airport terminal is Japan's first-ever airport terminal that has earned a Net Zero Energy Building (ZEB) rating. The Group has incorporated a range of sustainable, energy-saving measures. It was designed based on a plan that will make primary energy consumption around 68% less than a comparable structure built to the national standard, and for which the project was accredited with the ZEB Ready rating by the Agency for Natural Resources and Energy of Japan's Ministry of Economy, Trade and Industry. It has also earned the highest ranking of the Building-housing Energy-efficiency Labeling System (BELS), and is the first airport terminal in Japan to actively adopt CLT* as a structural material for its roof.

Projects Utilizing CLT

Diverse Initiatives to Improve Environmental Performance of Condominiums

Mitsubishi Estate Residence employs the Five Eyes process to ensure the quality of its residences. Eco Eyes is one of the five. The company uses various creative approaches to support eco-friendly, affordable lifestyles.

1. Soleco power systems save electricity and money


Soleco is an environmental system that balances environmental friendliness with affordability by reducing electricity costs for condominium units and shared areas. This is achieved by combining high-voltage collective power systems with solar power systems in condominiums.

2. Various techniques enhance insulation effectiveness

Mitsubishi Estate Residence uses a range of techniques to enhance insulation effectiveness, such as applying external and internal insulation, taking measures to prevent dew condensation and using multi-layered glass. In line with the 2013 energy conservation standards for residences that went into full effect on April 1, 2015, the company aims to earn insulation performance level 4 and primary energy consumption level 4 for all the residences for which it makes application for building confirmation thereafter.

In fiscal 2016, The Parkhouse Futakotamagawa Midori no Mori and The Parkhouse OIKOS Mikunigaoka were both certified as low-carbon buildings under Japan's Law on the Promotion of Low-Carbon Cities.

3. Highly efficient devices save energy

In the condominiums sold by Mitsubishi Estate Residence, high-efficiency equipment is adopted, such as shower heads that conserve hot water, faucets that conserve hot water, bathtubs that retain heat, and toilets that conserve water. This contributes to the creation of a pleasant lifestyle that takes both the environment and economy into account.

Obtaining Low-Carbon Building Certification for Condominiums

The Parkhouse Futakotamagawa Midori no Mori / Photo of exterior

The Parkhouse OIKOS Mikunigaoka / CG image of expected exterior when complete

Mitsubishi Estate Residence began offering The Parkhouse Futakotamagawa Midori no Mori in Setagaya-ku, Tokyo in fiscal 2017, and The Parkhouse OIKOS Mikunigaoka in Sakai, Osaka in fiscal 2018, condominiums certified as "low-carbon buildings."* All Futakotamagawa Midori no Mori condominium units are fitted with a central air-conditioning system known as Condominium Aerotech which maintains a comfortable temperature throughout the unit while OIKOS Mikunigaoka has installed ENE-FARM type S residential fuel cells. The adoption of these and multiple other cutting-edge environmental technologies are part of the company's efforts to make a low-carbon society a reality.

  • A system of certifications based on Japan's Law on the Promotion of Low-Carbon Cities given by government authorities to buildings in their jurisdiction which take extensive measures to reduce their carbon footprint.

Combining Energy Saving and Energy Creation to Enable Sustainable Living
The First ZEH-M Ready Feature for The Parkhouse Brand

As part of the Mitsubishi Estate Group initiative for sustainable urban development that proactively addresses climate change and environmental issues, Mitsubishi Estate Residence and Kintetsu Real Estate Co., Ltd. are adopting the ZEH-M Ready feature at The Parkhouse Shin-Urayasu Marine Villa residences which were offered for sale in late November 2020. This is the first condominium complex meeting ZEH-M Ready standards to be offered by The Parkhouse, the condominium series sold by Mitsubishi Estate Residence.

Net zero energy housing (ZEH) is a type of residence that aims to offset its annual primary energy*1 expenditure and graded standards have been set for reduction of primary energy consumption. The property has been evaluated by a third-party as reducing primary energy consumption by 50% by enhancing the energy saving performance of the building and employing energy-creating equipment such as solar power generation, etc., to generate its own electricity.

This property meets the ZEH-M Ready standard thanks to a new energy management system developed in collaboration with Mitsubishi Estate Residence, Kintetsu Real Estate, Mitsubishi Electric Corporation, and the Kansai Electric Power Group (Next Power Company). The system combines (1) thermal insulation performance that meets the ZEH standard, (2) heat pump-type water heater group control system for effective use of solar power generation inside the building, (3) and a power supply framework that efficiently distributes solar power to each unit via a building-wide shared solar power generation and supply network. All of this reduces annual utility costs by approximately 38%*2 in each unit and savings of approximately 100,000 yen annually per unit.

This new style of environmentally-conscious condominium that combines energy saving and energy creation delivers environmentally-friendly, comfortable, and sustainable living.

  • Primary energy refers to petroleum, natural gas, sunlight, and other naturally-derived energy sources. Primary energy consumption is calculated based on heating and cooling, ventilation, lighting, hot water supply, and five other categories.
  • According to Next Power Company research.
BELS ZEH-M - この住棟のエネルギー消費量50%削減 建築物省エネルギー性能表示制度 国土交通省告示に基づく第三者認証 2019年11月22日交付

A full-scale artist rendering of the project

Using ENE-FARM as a Standard Feature in All The Parkhouse Stage Detached Houses

Mitsubishi Estate Residence's The Parkhouse Stage series of detached houses have used ENE-FARM residential fuel cells as a standard feature*1 in all homes in the area supplied by Tokyo Gas or Keiyo Gas from the design stage which began in November 2017. ENE-FARM is a distributed energy system that is gentle on the global environment because it saves energy, cuts down on CO2 emissions and limits maximum power consumption.

ENE-FARM produces electricity by causing hydrogen taken from municipal gas supplies to react with oxygen in the air. The electrical power generated is used by households and the heat generated in the process is used to supply hot water. Since the electricity is used in the same place where it is produced, there are no supply losses. The heat generated while making the energy is also used without any waste, so it is a highly environmentally-friendly system.

ENE-FARM is equipped with a continued power generating function that operates even during power outages.*2 In the unlikely event of a power outage, it provides electrical energy to power lights and communication devices through a custom outlet. Hot water and heating connected to ENE-FARM can be used as well. Furthermore, when there is a water outage or a disaster, water can be drawn from the hot water tank and used for non-drinking purposes.

To create homes that are kind to the global environment, the company will continue to actively encourage the adoption of environmentally-friendly home equipment and devices in the future as well.

  • Excludes areas not served by Tokyo Gas or Keiyo Gas.
  • For ENE-FARM to produce energy during a power outage, ENE-FARM must already be producing electricity when the power outage occurs and the municipal gas and water utilities must still be supplied.

Exterior of The Parkhouse Stage Higashitotsuka using ENE-FARM for all homes

Combining Aerotech with Solar Power Generation to Meet Net Zero-Energy House (ZEH) Standards

Aerotech is a central air conditioning system that Mitsubishi Estate Home offers in its custom-built homes. It provides heating, cooling, and ventilation for the entire home using a single compact indoor unit. The Aerotech system delivers the industry's top-class heating and cooling efficiency that helps lower power consumption while allowing residents to set room temperatures individually across the entire residence, including the bath and toilet. It also contributes to preventing heatstroke and heat shock by minimizing temperature differences across the home. Since its debut in 1995, the system has been installed in more than 90% of the company's custom-built detached homes, and is in use in more than 10,000 houses. Building on a track record of 25 years since its release, the company is continuing to evolve as an entire-home air conditioning system pioneer.

Starting October 2019, Mitsubishi Estate Home, in collaboration with a service provider, began offering Zuttomo Solar for Aerotech, a service that provides free installation of solar power generation equipment for customers who purchase a detached custom-built home. By combining solar power generation with features such as Aerotech and the Home Energy Management System (HEMS), CO2 emissions can be reduced by nearly 900 kg per year compared with homes heated and cooled using individual heat pump air conditioners. Furthermore, thanks to the annual power capacity delivered by the solar power generation system (approximately 2,500 kWh equivalent*), annual heating and cooling energy expenditure (approximately 2,100 kWh equivalent*) is essentially zero. Thanks to these features, we are able to meet the standards of the national Net Zero Energy House (ZEH) initiative (houses that achieve both near-zero or less net energy consumption per year and a comfortable indoor environment at the same time) promoted by the Japanese government.

Going forward, Mitsubishi Estate Home looks to promote its Aerotech and Zuttomo Solar for Aerotech services even further to provide customers with an energy efficient, comfortable home environment while contributing to the reduction of CO2 emissions.

  • Figures are simulations by Mitsubishi Estate Home assuming an approximately 150 square meters model plan (as of January 2020).
Comparison of annual CO<sub>2</sub> emissions (converted figure)

Initiatives proposed by the Architectural Design and Engineering Group; Environmental Architecture of Sharing Wellness and Happiness / Net Zero Energy Building (ZEB)

Mitsubishi Jisho Sekkei has defined "Environmental architecture" as architecture that allows residents and users to share wellness and happiness to offer high added value architectural design. it aims to be environmentally conscious, provide comfort, promote wellness, and deliver personal design for higher productivity. This new concept delivers the design of comprehensive environmental where interactions among people create new and diverse values.

KANKYO KENCHIKU - Envionmental Architecture of Sharing Wellness and Happiness

ZEB Initiatives—Achieving both Net Zero Energy Building and Comfort

In addition to improving "energy efficiency" toward ZEB, we are introducing a variety of environmentally friendly technologies in large-scale buildings with the aim of creating a highly comfortable working environment that provides diverse work styles and worker preferences. These technologies have been introduced through the development of new systems, the experimental stage, and the demonstration stage in small and medium-sized buildings, and we are working on the design of tenant office buildings with next-generation energy efficiency and comfort based on simulations and actual measurements.

Higashi-Gotanda 1-Chome Building Obtains ZEB Ready

Mitsubishi Jisho Sekkei was commissioned by the Japan Real Estate Investment Corporation (JRE) to examine the possibility of reducing CO2 emissions for its entire portfolio and to identify properties that could be converted to Net Zero Energy Buildings (ZEB)*1 while carrying out concrete examinations aimed at converting such properties to net-zero-energy buildings. Specifically, Mitsubishi Jisho Sekkei proposed methods for reducing CO2 emissions after analyzing building age, building envelope performance, building scale, and air conditioning and lighting systems. Based on the analysis results, JRE set a target of converting between five and ten of its properties to net-zero-energy buildings by 2030. As a first step toward achieving this target, JRE acquired ZEB Ready*2 certification at the design stage and a five-star rating under the Building-housing Energy-efficiency Labelling System (BELS) for its Higashi-Gotanda 1-Chome Building.

  • Buildings with annual primary energy consumption of net zero or less
  • As advanced buildings in anticipation of ZEB certification, buildings awarded ZEB Ready certification are those with primary energy consumption that has been reduced more than 50% compared with standard primary energy consumption, excluding renewable energy.
BELS ZEH-M - この住棟のエネルギー消費量50%削減 建築物省エネルギー性能表示制度 国土交通省告示に基づく第三者認証 2019年11月22日交付

Publishing the Tokyo Metropolitan Environmental Security Ordinance Report on Measures against Global Warming

Please click below to view Mitsubishi Estate's Report on Measures against Global Warming.

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