News Release
【MIRARTH Energy Solutions】 Commencement of Special High Voltage System Storage Battery Project ~ Contributing to a Stable Supply of Electricity by Utilizing the Tokyo Metropolitan Government's Subsidy Project ~
August 29, 2025
MIRITH Energy Solutions Inc. (Headquarters: Shinjuku-ku, Tokyo / Representative Director: Kentaro Taniguchi, hereinafter referred to as "MES"), a group company of MIRARTH HOLDINGS, Inc.(Headquarters: Chiyoda-ku, Tokyo / Representative Director: Kazuichi Shimada) has established MIRAI Tokyo Storage LLC through joint investment with Tokyo Century Corporation (Headquarters: Chiyoda-ku, Tokyo / Representative Director President: Koji Fujiwara) and has decided to start a special high-voltage system storage battery* business (hereinafter referred to as the "Project") in Yokohama City, Kanagawa Prefecture. This project has been selected for the FY6 "Large-scale Storage Battery Introduction Support Project for Grids with an Expectation of Expanding the Introduction of Renewable Energy" publicly solici Reiwa ted by the Tokyo Metropolitan Environment Corporation. The rated output is 12,000 kW, the rated capacity is 65,808 kWh, and the operation is scheduled to begin in FY2029.
*An extra-high voltage storage battery is a storage battery (with an installed capacity of 2,000 kW or more) that is directly connected to a power grid (power plants, transmission lines, substations, etc.) and is used to respond to supply and demand fluctuations in the entire power system, rather than to output fluctuations of a specific power source.
Business Overview
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- Operator:
- MIRAI Tokyo Energy Storage LLC
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- Planned location:
- Asahi Ward, Yokohama City, Kanagawa Prefecture
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- Output:
- 12,000kW
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- Capacity:
- 65,808kWh
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- Battery:
- Lithium-ion battery
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- Size area:
- Approximately 8,000㎡
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- Start date:
- Fiscal year 2029 (planned)
Overview of MIRAI Tokyo Energy Storage LLC
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- Location:
- 3 Kanda Neribeicho, Chiyoda-ku, Tokyo
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- Representative:
- Tokyo Century Corporation
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- Partner:
- Tokyo Century Co., Ltd., MIRARTH Energy Solutions Inc.
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- Establishment:
- October 15, 2024
Background to the launch of this joint venture and future prospects
In recent years, the importance of grid storage batteries to adjust the balance between supply and demand of electricity from the perspective of promoting renewable energy and mitigating output fluctuations has increased. In the Kanto area, responding to fluctuations in the output of renewable energy, which is expected to be further introduced in the future, is an issue, and many adjustment capabilities, including grid storage batteries, are required.
Against this background, MES has decided to enter this project, which can contribute to the stabilization of grid power and the improvement of value in local communities. MES will continue to promote the development of grid storage stations nationwide, contribute to the expansion of renewable energy introduction and the stability of regional grid power, and work on Realizing a Decarbonized Society.
MIRARTH HOLDINGS Group's commitment to Energy Business
The Group has set "To design sustainable environments for a happier future for both people and our planet." as our Purpose and hopes to contribute to solving social issues and achieving the SDGs by engaging in sustainability activities through its business, such as the supply of housing and the development of renewable energy.
Since entering the mega solar business in 2013, the Group's Energy Business has been expanding its business scale year by year, including entering the biomass power generation business and the wind power generation business in 2021.
MES, which plays a central role in Energy Business, develops, operates, and manages renewable energy power generation businesses centered on solar power generation with a view to achieving carbon neutrality with a corporate vision of "Creating a Carbon-Neutral World with Renewable Energy." In February 2024, we established a local subsidiary in Cambodia and are promoting initiatives aimed at coexistence with the local community while expanding our business scope, such as starting research on the processing of Cambodian cashew nuts in Cambodia and the biomass fuel conversion business using cashew nut shells.
In addition, as a Addressing climate change, we have set a medium- to long-term goal of reducing greenhouse gas emissions by 45 % by FY2030 (compared to FY2022) and net zero by FY2050. We will continue to support and promote initiatives to achieve the SDGs throughout the Group and strive to realize a sustainable society.
* Release issued on March 29, 2024:"Notice of Revision of Medium- to Long-Term Targets for Reducing Greenhouse Gas Emissions -Promoting efforts to achieve carbon neutrality by 2050"
Company Profile (Tokyo Century)
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- Company:
- Tokyo Century Corporation
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- CEO:
- Representative Director President Koji Fujiwara
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- Location:
- Fuji Soft Building, 3 Kanda Neribeicho, Chiyoda-ku, Tokyo 101-0022
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- Establishment:
- July 1969
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- Business:
- Domestic leasing business, automobility business, specialty business, international business, environmental infrastructure business, etc.
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- Capital:
- 81,129 Millions of yen
Company Profile (MIRARTH HOLDINGS)
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- Company:
- MIRARTH HOLDINGS, Inc.
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- CEO:
- Representative Director Kazuichi Shimada
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- Location:
- 16F Tekko Building, 1-8-2 Marunouchi, Chiyoda-ku, Tokyo 100-0005
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- Establishment:
- September 1972
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- Business:
- Management of group companies, etc.
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- Capital:
- 9,056 millions of yen
Company Profile(MIRARTH Energy Solutions)
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- Company:
- MIRARTH Energy Solutions Inc.
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- CEO:
- Kentaro Taniguchi
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- Location:
- 〒162-0824 1-18 Yobacho, Shinjuku-ku, Tokyo Iidabashi Building 5F
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- Establishment:
- March 2016
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- Business:
- Renewable Energy Business
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- Capital:
- 2,155 million of yen