Creating attractive living spaces
Environmental consideration in daily life

We will proactively introduce facilities and equipment that minimize the environmental burden stemming from condominiums and contribute to the environment of cities as a whole.

Net Zero Energy House (ZEH) initiatives

The Haseko Group is working to achieve a decarbonized society through the promotion of net Zero Energy House (ZEH), a building with net zero annual energy consumption.

Promotion of ZEH condominiums (ZEH-M) business

As more importance is attached to reducing CO2 emissions in the household sector toward a decarbonized society, it has become essential to promote energy-saving of the house itself. With the understanding that realizing energy-saving condominiums is an area that can greatly contribute to realizing a decarbonized society, Haseko Group is making efforts to promote ZEH-M.
Of the ZEH-M Oriented category properties designed and constructed by Haseko Corporation in fiscal 2020, two properties were adopted as a high-rise ZEH-M support project and one property was adopted as a superhigh-rise ZEH-M demonstration project. We have handled seven cases in total under the ZEH-M project.

Superhigh-rise ZEH-M demonstration project: PREMIST TOWER Utsubohonmachi

PREMIST TOWER Utsubohonmachi (developer: Daiwa House Industry Co., Ltd.), to be completed in February 2023, has been designed and constructed by Haseko Corporation and is a high-rise condominium with 36 stories above ground, one story underground, with 353 units in total. This project aims to build a condominium which contributes to the global environment by i) creating a comfortable housing space with a passive design that uses and adjusts natural energy; and ii) saving energy through the introduction of highly efficient facilities. Specifically, the use of a balcony shape that controls insolation, double windows, and low-e double glazing glass has improved the basic performance of the building. Furthermore, even though it is a high-rise condominium, primary energy consumption has reduced with the introduction of highly efficient air conditioning, ventilation, and energy-saving facilities, a home energy management system (HEMS), and LED lighting. As a result, this project was adopted as Haseko’s first superhigh-rise ZEH-M demonstration project under the ZEH-M Oriented category.

Conceptual computer-generated image of PREMIST TOWER Utsubohonmachi

Definition of ZEH-M
The ZEH Roadmap Examination Committee for Condominiums established within METI de nes ZEH-M by the number of oors as indicated below. ZEH for the residential building portion and ZEH for individual dwelling units are assessed individually and independently.

Research and technological development toward the realization of ZEH-M

Haseko Corporation is working on technological development for promoting the building of condominiums with high energy-saving performance and insulation performance, which are necessary for realizing ZEH.

Improved insulation: R&D for the introduction of high insulation specifications

Haseko Technical Research Institute conducted a full-scale experiment to verify anti-condensation performance in a heated environment test lab using high-performance openings (combined sash of aluminum and resin + Low-E multilayered glass) combined with high-performance insulating material. Using the Housing Test Building within the research institute, measurements concerning energy conservation effects and thermal environment of a well-insulated residence were analyzed and data was collected.

Test piece for the thermal environment experiment
Introduction of high-performance equipment: development of heat-pump floor heating with an air conditioner

Joint project with CORONA CORPORATION led to the development and commercialization of the heat pump floor heating with an air conditioner. This product features coordinated control of the air conditioner and the hot water floor heating system using an outdoor heat pump unit, to offer both the speedy heating of an air conditioner and the comfort of a floor heating system. Being eco-friendly and energy-efficient, it meets the requirements of ZEH-M. We are therefore promoting its use in ZEH-M projects.

Coordinated control using a wireless remote control
Development of a ZEH-M specification review support tool

Since METI’s ZEH-M demonstration project was launched in 2018, the ZEH-M Review Working Group at Haseko has been working to develop a ZEH-M Oriented speci cation product menu. However, the process of examining the speci cations and calculating the costs for the actual shape of buildings was time consuming and had been an issue.

Therefore, to enable designers to speedily calculate the building performance and costs that would meet the standards for adoption in the demonstration project from the planning and design stage, we developed a ZEH-M speci cation review support tool that helps designers to easily predict the building performance and costs, according to the product menu, with a high degree of accuracy. With this tool, we can quickly prepare ZEH proposals for buildings of various shapes. We will begin using this tool with the applications for the FY2020 ZEH-M demonstration project.

Environment-friendly initiatives

Initiatives at the design stage

Haseko Corporation proposes environment-conscious designs using the Environmental Consideration Check Sheet and calculates CO2 reduction rates using the CO2 Emissions Calculation Sheet for all its projects to promote the building of environment-conscious condominiums.

Proposing environment-conscious designs

In order to design condominiums taking into consideration the earth and the surrounding environment, Haseko Corporation makes design proposals utilizing the Environmental Consideration Check Sheet, which lists specific design proposals including saving energy and resources, consideration for the surrounding environment, long service life, consideration for human health, reduction in waste, and consideration for the global environment.
In FY2020, targeting 95% or higher adoption rate to the number of proposals made, we made design proposals for 86 projects and obtained the following results.


Number of proposals made Number of proposals adopted Adoption rate
Status of environment-conscious designs 4,035 3,967 98.3%

Calculation of CO2 reduction rate

In order to design condominiums with lower CO2 emissions, Haseko Corporation calculates the CO2 reduction rate by using the CO2 Emissions Calculation Sheet. The Sheet computes the CO2 reduction rate by converting into CO2 emissions the standard value and the design value of primary energy consumption of condominium unit areas and communal areas calculated for each project using a Web program in accordance with the Act on the Improvement of Energy Consumption Performance of Buildings.
In FY2020, targeting 10% or higher CO2 reduction rate (compared to the standard value under the Act on the Improvement of Energy Consumption Performance of Buildings), we implemented this initiative for 86 projects and obtained the following results.


Standard value Design value Reduction volume Reduction rate
Status of CO2 reduction rate (tons-CO2/year) 44,992 39,577 5,415 12.0%

Initiatives at RENAI Yokohama Totsuka

Sohgoh Real Estate has aggressively introduced initiatives conducive to environmental consideration in daily life at RENAI Yokohama Totsuka, which it handled as a developer.

Adoption of the eco-friendly H-BA Concrete

RENAI Yokohama Totsuka has adopted Haseko’s unique H-BA Concrete, an environment-friendly concrete that can reduce CO2 emissions derived from concrete materials while retaining the same performance as ordinary concrete.

Construction site
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Wooden communal building THE ROOF

We made a communal building built of wood, incorporating wood construction technologies. Wood has the benefits of less CO2 emissions during production and construction compared to other construction materials and also contributes to fixing CO2 emissions.

Wooden communal building THE ROOF

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Introduction of Individual Home Delivery Box

In addition to the communal area, a private delivery box has been installed in front of the door of each unit, contributing to fewer redelivery visits and reducing CO2 emissions from transportation.

Individual Home Delivery Box

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Installation of PET bottle collection machine

The PET bottle collection machine grants points usable at neighboring commercial facilities according to the number of collected PET bottles, prompting people to think about preserving the global environment in daily life.

Initiatives at Hosoda Corporation

Hosoda Corporation is proactively proposing products taking into consideration lower environmental burden and environmental symbiosis, aiming to create housing and communities that contribute to the global environment.

Promotion of energy-saving and zero-energy houses

Hosoda Corporation is making ongoing efforts to improve the energy-saving performance of houses in order to realize energy savings across society as a whole while improving the quality of life in areas such as convenience and comfort. By improving the insulation performance of exterior walls and windows and controlling the total energy consumption of buildings, its housing performance specifications adopt a standard that satisfies the 2013 Energy Saving Standard. Furthermore, Hosoda Corporation is working on supplying “certified low-carbon houses,” which reduce CO2 emissions, and “long‐life quality housing,” which promotes long service lives of buildings, as well as the “Tokyo Zero Emission House,” which, as designated by the Tokyo Metropolitan government, delivers a higher energy-saving performance by securing heat insulation and improving efficiency of facilities.
Hosoda Corporation also supplies the net Zero Energy House (ZEH), which achieves net-zero annual primary energy consumption by delivering higher thermal insulation and energy saving performance while also generating energy for use in the house by solar power or other means.

Initiatives for environmental symbiosis

Hosoda Corporation places importance on creating environment-conscious houses and communities to better the environment surrounding people and housing. Hosoda Corporation has been certified as the System Supply Type under the Environmentally Symbiotic Housing Certification with the objectives of Low Impact, High Contact and Health & Amenity. Its designs focus not only on the physical performance of housing, but also on qualities such as sunshine and wind flow. By planting abundant greenery around buildings, mitigating radiant heat, adjusting and utilizing rainwater, and taking other initiatives, Hosoda Corporation works on creating communities in harmony with the environment.

Units were sold from Growing Square Seijo Gakuen-mae, using the subsidy under the Tokyo Zero Emission House Introduction Promotion Project of the Tokyo Metropolitan government.
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