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Enter the Grid Storage Battery Business Toward a Sustainable Future: Supporting Infrastructure with “Grid Electricity Storage”

Aug. 25, 2025

We hereby announce our entry into the grid storage battery business as a new venture.
This business involves installing large-scale battery systems and participating in electricity markets to charge and discharge electricity. This contributes to stabilizing and improving the efficiency of the power grid—particularly by smoothing fluctuations in renewable energy—and helps balance supply and demand.

Starting in Kanagawa and Saitama prefectures, we aim to make effective use of our assets and contribute to solving Japan’s energy issues.
We will continue our efforts toward realizing a sustainable society through “challenge and innovation.”

Details of the business are as follows:

Background of Entry

Our company operates core infrastructure businesses, including logistics and real estate, which serve as the foundation of society. In our Business Plan (2025–2030), we commit to creating new value to support society. Against this backdrop, we began considering the grid storage battery business as a long-term initiative to contribute to the environment and society, making effective use of our own assets, which led to our entry into this field.

Business Overview

  1. 11. We will install large-scale batteries on company-owned land (partly leased) and connect them to the power grid, conducting electricity transactions in the wholesale electricity market, supply-demand adjustment market, and capacity market.
  2. 22. Leveraging the know-how gained in operating large-scale electrical facilities for data center buildings, our group company will handle maintenance and management of these facilities.
  3. 33. Each facility is expected to operate for 20 years (the projected lifespan of the batteries).

Flow of “Grid Electricity Storage”

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Project Overview

Kohoku Grid Electricity Storage
(tentative)

Kodama Grid Electricity Storage
(tentative)

Location

Yokohama City, Kanagawa Prefecture

Honjo City, Saitama Prefecture

Site Area

Approx. 13,000 m²

Approx. 900 m²

Rated Output

Approx. 85 MW

Approx. 2 MW

Rated Capacity

Approx. 340 MWh

Approx. 8 MWh

Battery Type

Lithium-ion battery

Lithium-ion battery

Total storage capacity: Approx. 350 MWh

One full charge/discharge cycle per day is equivalent to total daily electricity usage of approximately 40,000 households.
Source: Tokyo Electric Power Company Holdings, Incorporated

Investment Amount

Total for both sites: Approx. ¥20 billion

Schedule

FY2026
Construction of Kodama Grid Electricity Storage (tentative) begins
FY2027
Kodama Grid Electricity Storage (tentative) begins operation
FY2028
Construction of Kohoku Grid Electricity Storage (tentative) begins
FY2030
Kohoku Grid Electricity Storage (tentative) begins operation

Other Information

  1. 1In addition to the above two locations, we plan to expand to five more sites in other prefectures. The total capacity across all seven sites is expected to be approximately 700 MWh.
  2. 2This business is named “Grid Electricity Storage” to reflect its role in storing and managing electricity. The trademark was registered in November 2024.
  3. 3The business originated from our internal proposal program, the “MLC Innovation Program.”
  4. 4We have created a concept video for “Grid Electricity Storage”. Please take a look: https://eqm.jp/mWrUH7 (Japanese Only)
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