NTT Urban Development x Resil Launches "Susregi Life," a next-generation lifestyle that enhances both sustainability and resilience, in the Wellith series for the first time

July 29, 2025 NTT Urban Development Corporation

NTT Urban Development Corporation (Headquarters: Chiyoda-ku, Tokyo; President and CEO: Kou Ikeda) is pleased to announce that it will be launching "Susregi Life," a next-generation lifestyle that enhances both sustainability and resilience, for the first time in its "Wellith" housing brand series.

"Susregi Life" is a next-generation lifestyle realized by combining our "Zetch Mansion *2" and "Wellith Lifestyle Disaster Prevention *3" with the "Mansion Disaster Prevention Service *4," an energy creation and storage system provided by Resil Co., Ltd. (Head office: Chiyoda-ku, Tokyo; President and CEO: Yasuzumi Tanji).

Through this initiative, we will provide comfortable and economical living during normal times through highly insulated and energy-efficient designs, and in the event of a disaster, we will enable the continued use of elevators and toilets*5, ensure communication means through Wi-Fi in common areas and disaster prevention outlets *5, and provide support in terms of both hardware and software for evacuation at home for three days *1 by preparing disaster prevention supplies.

Starting with the first property, "Wellith Urban Magome (tentative name)," currently under construction in Ota Ward, Tokyo, we aim to gradually expand "Susregi Life" into the "Wellith" series.

NTT Urban Development proposes a next-generation lifestyle that enhances both sustainability and resilience

- Image of next-generation lifestyle realized through "Susregi Life" -
- Image of next-generation lifestyle realized through "Susregi Life" -
- Image of next-generation lifestyle realized through "Susregi Life" -

"Susregi Life ~Sustainable & Resilient Life~"
NTT Urban Development is currently applying for trademark registration.

Background of the introduction

In recent years, with growing environmental awareness, carbon neutral housing is becoming more common.
Furthermore, as the increase in the number and severity of natural disasters becomes a social issue, there is a growing movement to encourage people to "evacuate at home" if their safety can be ensured at home in the event of a disaster.

By developing the "Zetch Mansion *2," which features high insulation performance and highly efficient equipment, we aim to become carbon neutral, and through our unique disaster prevention initiative, "Wellith Life Disaster Prevention *3," we provide a disaster-resistant lifestyle.

Resil uses a solar power and battery storage system to ensure a power supply to elevators and water supply and drainage pumps, which support daily life infrastructure, in the event of a disaster, and during normal times, it provides an "apartment disaster prevention service *4" that uses 100% renewable energy *6 for the entire apartment building through a centralized power supply system.

In addition to the services provided by these two companies, we will provide "Susregi Life," a next-generation lifestyle that enhances both sustainability and resilience, by ensuring communication means even during power outages through Wi-Fi in common areas and disaster prevention outlets.

The lifestyle that "Susregi Life" aims for

~The lifestyle that "Susregi Life" aims for~
~The lifestyle that "Susregi Life" aims for~

The properties that offer "Susregi Life" are Zetch Mansions *2 equipped with high-performance insulation and highly efficient equipment, and under normal circumstances, the bulk power supply provided by Resil supplies 100% renewable energy *6 to the entire apartment building * 7, regardless of whether it is a private or shared area.

In the event of a disaster (power outage), the storage battery will supply power to elevators and water supply and drainage pumps, assuming the three-day evacuation period recommended by Tokyo and other local governments. Even if the battery's power runs low, the solar power generation system can repeatedly charge the battery, maintaining a three-day power supply *1. This allows residents to move between floors and use the restrooms even in high-rise apartment buildings *5. Furthermore, by supplying power to Wi-Fi equipment and emergency outlets in some common areas of the apartment building, residents will be able to use and charge smartphones, which are essential for maintaining communication with the outside world *5. As part of the "Wellith Life Disaster Prevention" initiative, the disaster prevention warehouse will be stocked with disaster preparedness supplies and residents will be provided with a disaster preparedness guide, supporting three-day evacuation periods at home in both hard and soft ways.

~ Equipment operation patterns during power outages ~

(Tentative name) Wellith Urban Magome project simulation

- Image of next-generation lifestyle realized through "Susregi Life" -
- "Wellith Lifestyle Disaster Prevention" supports three-day evacuation at home with both hardware and software -

Note: The equipment used varies depending on the property.

- "Wellith Lifestyle Disaster Prevention" supports three-day evacuation at home with both hardware and software -
  • The usable time of the equipment may be shortened due to factors such as higher-than-expected power usage, weather conditions, and the remaining battery charge during a power outage, so we cannot guarantee that you will be able to evacuate at home for three days.
  • A ZEH Mansion is a home that aims to reduce primary energy consumption by more than 20% (note) and achieve a zero annual balance of primary energy consumption by improving insulation performance and achieving significant energy savings while maintaining the indoor environment through the introduction of efficient equipment. Our company registered as a ZEH developer in fiscal 2021, and is actively promoting the acquisition of environmental certifications such as ZEH, aiming for ZEH-M Oriented or higher standards in principle for all developed properties nationwide.
    For more information about NTT Urban Development 's Zeh Mansion project, please visit the official website (https://wellith.jp/top/concept/zeh/).
    (Note) Comparison with the standard primary energy consumption for "heating," "cooling," "ventilation," "lighting," and "hot water" according to the FY2016 Energy Conservation Standards (Ministry of Land, Infrastructure, Transport and Tourism website, "Energy Conservation Standards Summary Document")
  • Wellith Life Disaster Prevention is a disaster prevention initiative developed by NTT Urban Development to provide long-term peace of mind.
    We are working to provide disaster prevention for your daily life, so that you can always feel safe, by taking into consideration three aspects: the apartment building, cooperation between residents, and yourself.
    For details, please refer to the official website (https://wellith.jp/apartment/disaster_prevention/).
  • The apartment disaster prevention service is a service that installs a solar power generation system and storage batteries in addition to the "apartment bulk power receiving service" provided by Resil, which not only maintains an emergency power source in the event of a disaster, but also achieves decarbonization by utilizing essentially renewable energy during normal times.
  • The use of elevators, toilets, the Internet, emergency outlets, etc. is not guaranteed to be available during a disaster, as it is affected by the severity of the disaster, weather conditions, and other conditions other than electricity. In addition, there may be cases where electricity cannot be supplied due to unexpected power usage, weather conditions, the remaining battery charge during a power outage, etc.
  • Based on renewable energy, including non-fossil fuel certified electricity.
  • Excludes some facilities such as electric vehicle charging stations.

About the first property of "Susregi Life" "Wellith Urban Magome (tentative name)"

Wellith Urban Magome (tentative name), a large-scale rental apartment project, is a rental apartment complex with a total of 481 units, incorporating a large co-working space, based on the concept of "next-generation work-life residence." By deploying "Susregi Life" in this property, we will strengthen the resilience of the residence and contribute to the realization of a carbon-neutral society.

[Property Overview of Wellith Urban Magome (tentative name)]

location1-33-1, 7, 8, 9 Nakamagome, Ota-ku, Tokyo (land number)
traffic7 minutes walk from Magome Station on the Toei Asakusa Line
11 minutes walk from Ebaracho Station on the Tokyu Oimachi Line
13 minutes walk from Nagahara Station on the Tokyu Ikegami Line
Site area6,440.50㎡
Gross Floor Area24,986.93㎡
Use and number of unitsApartment complex (481 units), retail stores, service industry stores, offices
Structure and number of floorsReinforced concrete structure (partially steel frame), 14 floors above ground, 1 floor below ground
Building completion dateLate August 2027 (planned)
CG rendering of the completed exterior
CG rendering of the completed exterior *8
  • The CG rendering of the completed exterior is based on drawings from the planning stage and may differ from the actual building. Please note that it does not depict the details of the exterior wall shape or the facilities and equipment. The texture and color of the tiles and various components may appear different from the actual product.

Based on NTT Urban Solutions Group's slogan "Green Future with US*," which aims to reduce environmental impact, we are actively working on environmentally friendly real estate development.

"Green Future with US" - Creating a prosperous and sustainable future together -

At NTT Urban Solutions Group, we work together with everyone who is building and gathering together to create "our town of tomorrow."
Making the most of ICT, real estate, energy, and environmental technologies, we aim to create a prosperous and sustainable future.
"A future where society is decarbonized," "A future where resources are recycled," and "A future where people and nature coexist."
We will achieve this.

https://www.ntt-us.com/sustainability/environment/index.html

"Green Future with US" is a registered trademark of NTT Urban Solutions, Inc.

Reference: About NTT Urban Development 's housing brand "Wellith" series

The "Wellith" series of housing brands supports daily life, capturing the essence of values of diverse generations and responding to the changing times, creating new value in towns and homes, and meeting customer expectations. We offer a variety of housing options, including condominiums, detached houses, renovated homes, senior housing with services, rental residences, and student residences.

Wellith Homepage
https://wellith.jp/
Wellith logo

Reference: About Resil Co., Ltd.

Resil's purpose is to "continue to tackle social challenges as a uniting force." By combining technology with the knowledge of electricity cultivated over 30 years of business operations, the company contributes to the realization of a decarbonized society through optimal energy control. Guided by its mission of "making decarbonization a non-trivial problem," the company operates three businesses: distributed energy, green energy, and energy digital transformation. It provides services that are convenient and reliable options for businesses, consumers, and even local governments, while also unconsciously contributing to decarbonization.

[Contact Information]

NTT Urban Development Corporation
Public Relations Office Kobari/Abe 
nttud-pr@ntt-us.com