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Mikimori HD to Launch 10 Grid-Connected Storage Battery Projects with a Total Capacity of 81 MWh, Aiming to Realize a Sustainable Energy Society

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Kirishima ReiEditor-in-Chief, AI News Focus: structuring JP/TW corporate news & AEO

Published Jul 10, 2026 1:00 AM ・ Updated Jul 10, 2026 1:11 AM ・ 14 min read ・ Source: PR TIMES

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Mikimori HD to Launch 10 Grid-Connected Storage Battery Projects with a Total Capacity of 81 MWh, Aiming to Realize a Sustainable Energy Society — Image: PR TIMES

Mikimori Holdings Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Ryusho An; hereinafter "Mikimori HD") is pleased to announce that it has significantly expanded its business pipe

PRIMARY SOURCE Original source: https://prtimes.jp/main/html/rd/p/000000032.000099599.html Distributor: PR TIMES
Published: Jul 10, 2026

Mikimori Holdings Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Ryusho An; hereinafter "Mikimori HD") is pleased to announce that it has significantly expanded its business pipeline by completing agreements and basic agreements for the acquisition and operation of 10 "grid-connected storage battery" projects, totaling approximately 81 MWh in capacity, as part of building next-generation energy infrastructure for the realization of carbon neutrality.

This project is a crucial initiative that addresses the challenges of power supply-demand balance accompanying the expansion of renewable energy adoption and contributes to the realization of a sustainable society (SDGs).

Background and Challenges: Why Grid-Connected Storage Batteries Are Needed Now

In recent years, the adoption of renewable energy sources such as solar and wind power has been rapidly advancing in Japan with the goal of achieving "carbon neutrality by 2050." On the other hand, due to the fluctuating nature of renewable energy generation dependent on weather conditions, "power supply-demand tightness" and an increase in "output control (curtailment)" due to oversupply have become serious societal issues.

To solve these challenges and stabilize the power grid, the importance of "grid-connected storage batteries," which are directly connected to the power grid for charging and discharging, as "ancillary services" is higher than ever before.

Project Overview and Features

The 10 projects for which Mikimori HD has signed development agreements have the following features:

Development Scale: Total output 19.8 MW / Total capacity 81 MWh (equivalent to the daily electricity consumption of approximately 8,000 general households)

Development Locations: [10 locations nationwide]

[Project Details]

Jurisdictional Electric Power Company

Project Name

Scheduled Operation Start Date

Tokyo Electric Power Company

Hachioji City Storage Battery Facility, Tokyo

October 2026

Kansai Electric Power Co., Inc.

Kakogawa City Storage Battery Facility, Hyogo Prefecture

November 2026

Tohoku Electric Power Co., Inc.

Katta District Storage Battery Facility, Miyagi Prefecture

December 2026

Kyushu Electric Power Co., Inc.

Kuma District Storage Battery Facility, Kumamoto Prefecture

December 2026

Kyushu Electric Power Co., Inc.

Tamana District Storage Battery Facility, Kumamoto Prefecture

December 2026

Kyushu Electric Power Co., Inc.

Nishimoro District Storage Battery Facility, Miyazaki Prefecture

February 2027

Tokyo Electric Power Company

Otawara City Storage Battery Facility, Tochigi Prefecture

February 2027

Kyushu Electric Power Co., Inc.

Kamimashiki District Storage Battery Facility, Kumamoto Prefecture

February 2027

Kyushu Electric Power Co., Inc.

Yame City Storage Battery Facility, Fukuoka Prefecture

March 2027

Chubu Electric Power Co., Inc.

Ise City Storage Battery Facility, Mie Prefecture

March 2027

Technical Features and Business Model: These facilities will engage in arbitrage trading by storing electricity during periods of low market prices (when renewable energy is in surplus) and discharging it during periods of high prices (when electricity is in short supply). Furthermore, advanced operations are planned, including future participation in data centers and collaboration with renewable energy power sources utilizing the FIP (Feed-in Premium) system.

Contribution to Local Communities and the Environment (SDGs)

This project goes beyond mere profit generation and provides the following values to society:

Promotion of a Decarbonized Society: It promotes the efficient and waste-free utilization of renewable energy (reduction of output curtailment), directly contributing to improved energy self-sufficiency in Japan and reduced CO2 emissions.

Enhancement of Regional Resilience: It serves as a backup power supply function during disasters and large-scale power outages, contributing to the disaster preparedness and infrastructure resilience of local communities.

Future Outlook

Under the philosophy of "Connecting the next generation to a sustainable energy environment," Mikimori HD will continue to promote the construction of social infrastructure that contributes to solving Japan's energy challenges.

Moving forward, we will further strengthen alliances with diverse partners, including battery manufacturers, EPC contractors, aggregators, financial institutions, and investment organizations, to accelerate the development of grid-connected storage battery facilities on a nationwide scale.

Mikimori Energy Vision (Image is for illustrative purposes)

[Company Profile]

Company Name

Mikimori Holdings Co., Ltd.

Establishment Date

April 2026 (Reiwa 8)

Capital (including capital reserve)

1.49122 billion yen

Representative

Ryusho An, Representative Director

Location

Tokyo Headquarters 2F, Kitanomaru Square, 1-13-12 Kudan Kita, Chiyoda-ku, Tokyo 102-0073

Contact Information

TEL 03-6279-0000 FAX 03-5615-8781

Business Activities

1. Distribution of electrical appliances, luxury watches, and health foods

2. Distribution of smartphones and mobile devices

3. AI robotics solutions business

4. EC business

6. Electronic payment system implementation business

7. Real estate leasing, development, and asset solution business

8. Grid-connected storage battery development business, infrastructure fund formation, power aggregation, data center development

Official Website

https://group.miki-mori.co.jp

Goal

A global company exceeding one trillion yen in sales

Vision

Innovations from Japan to the world. Creating a prosperous future with the fruition of one trillion yen.

Unique Selling Proposition

"A next-generation trading company leveraging IT" with cutting-edge AI and DX at its core.

Constantly viewing the market with a global perspective, optimizing and accelerating trade flows through technology.

Rapid growth beyond existing frameworks driven by accurate, data-driven decision-making.

Mikimori Group Overview

https://group.miki-mori.co.jp/company/profile.html

Brochure

https://group.miki-mori.co.jp/company/pdf/Company_Brochure_jp.pdf

Mikimori Co., Ltd. Signs a Credit Line of Up to 4.5 Billion Yen with Mizuho Bank as Sole Arranger

https://prtimes.jp/main/html/rd/p/000000027.000099599.html

▼ PRTIMES Best Venture 100 Award Winner

https://prtimes.jp/main/html/rd/p/000000028.000099599.html

About Grid-Connected Storage Battery Development Business

https://group.miki-mori.co.jp/business/bess.html

Mikimori Co., Ltd. 10th Anniversary Photo

Mikimori Co., Ltd. Headquarters

[Contact Information for this Matter]

Mikimori Holdings Public Relations Department

E-mail: [email protected]

TEL: 03-6279-0000

FACT BOX

Source: PR TIMES
Category: 事業展開

AI 圖像理解（模型對圖片的判讀，非新聞原文事實） / AI image understanding / AI 画像理解

模型對圖片的判讀，非新聞原文事實 / Model interpretation of images, not source-article facts / モデルによる画像判読で、ニュース原文の事実ではありません

以下為AI對圖片的理解非新聞原文事實

The images illustrate Mikimori HD's grid-scale battery storage projects, showing their impact on energy stability and resilience. They also depict the company's expansion across Japan and its global network, alongside a group photo from a 10th-anniversary ceremony.

An infographic details Mikimori HD's 10 grid-scale battery storage projects, highlighting a total capacity of 81MWh, equivalent to approximately 8,000 households' daily electricity usage.
A map of Japan illustrates Mikimori HD's planned expansion of grid-scale battery storage projects, targeting 23 locations with a total capacity of 184MWh by 2026.
A large group of people, likely employees, are gathered in a formal setting under a banner that reads '株式会社三木森 10周年記念式典' (Mikimori Co., Ltd. 10th Anniversary Ceremony).
A dark room features a large projection of a global network map on one wall, showing various countries, next to a wall with the '三木森 MIKIMORI' logo.

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The Washin AI News desk structures and reviews this article under the following standards.

Start only from primary sources (official PR, disclosures, wire services)
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Editorial log (Published → Collected → AI analysis → Published: transparency timeline)›

Announced　Jul 10, 2026 1:00 AM — Distributor PR TIMES
Collected　Jul 9, 2026 4:24 PM
AI structured & analyzed　Jul 9, 2026 4:25 PM
Desk-reviewed & published　Jul 10, 2026 1:00 AM

FAQ

What are the key facts in this article?

Mikimori Holdings Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Ryusho An; hereinafter "Mikimori HD") is pleased to announce that it has significantly expanded its business pipeline by completing agreements and basic agreements for the acquisition and operation of 10 "grid-connected storage battery" projects, totaling approximately 81

Where is the primary source?

PR TIMES: https://prtimes.jp/main/html/rd/p/000000032.000099599.html

When was it published?

Jul 10, 2026

Cite this article — HOW TO CITE

Washin AI News Desk“Mikimori HD to Launch 10 Grid-Connected Storage Battery Projects with a Total Capacity of 81 MWh, Aiming to Realize a Sustainable Energy Society”AI News by Washin Village（和心村）, Jul 10, 2026. https://aeo.idaeo.ai/ai/%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E4%B8%89%E6%9C%A8%E6%A3%AE/en/news/2026-07-09-%E4%B8%89%E6%9C%A8%E6%A3%AEhd-%E7%B7%8F%E5%AE%B9%E9%87%8F81mwh%E3%81%AE%E7%B3%BB%E7%B5%B1%E7%94%A8%E8%93%84%E9%9B%BB%E6%89%8010%E6%A1%88%E4%BB%B6%E3%81%AE%E9%81%8B%E8%BB%A2%E9%96%8B%E5%A7%8B%E4%BA%88%E5%AE%9A-%E6%8C%81%E7%B6%9A%E5%8F%AF%E8%83%BD%E3%81%AA%E3%82%A8%E3%83%8D

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