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Grid-Scale Battery Storage System Handled in Miyako City, Fukuoka Prefecture, Completed; Infrastructure Base Established for Renewable Energy Diffusion and Regional Power Grid Stabilization Through Optimal Equipment Selection and Construction by the Company

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

Published Jun 12, 2026 10:00 PM ・ Updated Jun 13, 2026 11:59 PM ・ 9 min read ・ Source: PR TIMES

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⚡ Key Points

Sustainable Holdings Co., Ltd.
announced the completion of a grid-scale battery energy storage system in Miyako City, Fukuoka Prefecture, for which it handled equipment selection and construction.
This system will contribute to the stabilization of the regional power grid accompanying the expansion of renewable energy adoption and is scheduled to enter the supply and demand adjustment market around November 2026.

Sustainable Holdings Co., Ltd. announced the completion of a grid-scale battery energy storage system in Miyako City, Fukuoka Prefecture, for which it handled equipment selection and construction. This system will contribute to the stabilization of the regional power grid accompanying the expansion of renewable energy adoption and is scheduled to enter the supply and demand adjustment market around November 2026.

PRIMARY SOURCE Original source: https://prtimes.jp/main/html/rd/p/000000087.000096742.html Distributor: PR TIMES
Published: Jun 12, 2026

Grid-Scale Battery Energy Storage System, for Which Equipment Selection and Construction Were Handled in Miyako City, Fukuoka Prefecture, Has Been Completed

Sustainable Holdings Co., Ltd. (Head Office: Shibuya-ku, Tokyo; Representative Director: Kenta Mogi; hereinafter referred to as "the Company") is pleased to announce the successful completion of the grid-scale battery energy storage project in Miyako City, Fukuoka Prefecture, for which the Company was responsible for equipment selection and construction.

Through the operation of this grid-scale battery energy storage system, we will contribute to the stabilization of the regional power grid accompanying the expansion of renewable energy adoption, further promoting our efforts towards the realization of a sustainable decarbonized society.

Background of Completion and Commitment to Integrated In-house "Equipment Selection and Construction"

The Company has advocated for regional symbiosis through its energy business and has been developing total solutions from optimal equipment selection to construction of grid-scale battery energy storage systems.

For the project in Miyako City, Fukuoka Prefecture, we meticulously analyzed the grid connection environment and characteristics of the region to select equipment for a battery system that would operate most efficiently and for the longest term. Furthermore, by consistently implementing thorough construction and quality management in-house from design to construction, we have established a robust energy infrastructure with safety as the top priority and high reliability.

The grid-scale battery energy storage system, for which Sustainable Holdings handled equipment selection and construction, has been newly completed in Miyako City, Fukuoka Prefecture.

Social Significance of Grid-Scale Battery Energy Storage Systems and Deployment into the Supply and Demand Adjustment Market in November 2026

Currently, while the adoption of renewable energy (such as solar power generation) is accelerating in Japan, ensuring "adjustment capacity" to maintain the supply-demand balance of the regional power grid due to fluctuations in power generation caused by weather is an urgent issue.

The grid-scale battery energy storage system completed in Miyako City plays a crucial role in maintaining frequency within the regional power grid by charging when there is an excess supply of electricity and discharging when there is a shortage.

This grid-scale battery energy storage system is scheduled to enter the supply and demand adjustment market, including the primary adjustment capacity market, around November 2026. Moving forward, we will support the optimization of advanced control technologies for the batteries. By continuing to provide flexible adjustment functions in line with market needs, we aim to contribute to the stability of regional infrastructure and the overall efficiency of the power industry. We will support the optimization of advanced control technologies. By continuing to provide flexible adjustment functions in line with market needs, we aim to contribute to the stability of regional infrastructure and the overall efficiency of the power industry.

About Sustainable Holdings Co., Ltd.

The Company operates energy and glamping businesses with the themes of "Regional Symbiosis" and "Realization of a Decarbonized Society." We contribute to the spread of clean energy, including batteries and solar power, with our reliable construction technology and expertise in equipment selection.

Company Name: Sustainable Holdings Co., Ltd. Head Office Location: 6F, Shibuya Sakura Stage SAKURA Tower, 3-21-3 Shibuya, Shibuya-ku, Tokyo 150-0002 Representative Director: Kenta Mogi Business Activities: Energy business, production and operation of glamping facilities Company URL: https://st-holdings.co.jp/

Contact for Media Inquiries Regarding This Matter

For interview requests or detailed information regarding installation and construction, please contact us via the inquiry form below.

* Company Name: Sustainable Holdings Co., Ltd. * Department: Energy Business Division * Inquiry Form: https://st-holdings.co.jp/contact-us/

FACT BOX

Source: PR TIMES
Category: News

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Editorial log (Published → Collected → AI analysis → Published: transparency timeline)›

Announced　Jun 12, 2026 10:00 PM — Distributor PR TIMES
Collected　Jun 12, 2026 1:21 PM
AI structured & analyzed　Jun 12, 2026 4:51 PM
Desk-reviewed & published　Jun 12, 2026 10:00 PM

FAQ

What role does this battery system play?

It absorbs fluctuations from renewable energy and contributes to stabilizing the power grid frequency and maintaining supply-demand balance.

What is the supply and demand adjustment market?

It is a market established to adjust the balance of electricity supply and demand, where batteries and other resources are utilized as adjustment capacity.

What are Sustainable Holdings' strengths?

Their strength lies in establishing safe and reliable infrastructure by consistently handling everything from optimal equipment selection to construction.

What is the impact of this project on the region?

By stabilizing the regional power grid, it promotes further adoption of renewable energy and contributes to decarbonization.

What are the future prospects?

By optimizing advanced battery control technologies and providing flexible adjustment functions that meet market needs, they aim to contribute to the overall efficiency of the power industry.

Cite this article — HOW TO CITE

Washin AI News Desk“Grid-Scale Battery Storage System Handled in Miyako City, Fukuoka Prefecture, Completed; Infrastructure Base Established for Renewable Energy Diffusion and Regional Power Grid Stabilization Through Optimal Equipment Selection and Construction by the Company”AI News by Washin Village（和心村）, Jun 12, 2026. https://aeo.idaeo.ai/ai/st-holdings-co-jp/en/news/2026-06-12-%E7%A6%8F%E5%B2%A1%E7%9C%8C%E5%AE%AE%E8%8B%A5%E5%B8%82%E3%81%AB%E3%81%A6%E6%89%8B%E3%81%8C%E3%81%91%E3%81%9F%E7%B3%BB%E7%B5%B1%E7%94%A8%E8%93%84%E9%9B%BB%E6%B1%A0%E3%81%8C%E7%AB%A3%E5%B7%A5-%E8%87%AA%E7%A4%BE%E3%81%AB%E3%82%88%E3%82%8B%E6%9C%80%E9%81%A9%E3%81%AA%E6%A9%9F%E5%99%A8%E9%81%B8%E5%AE%9A-%E6%96%BD%E5%B7%A5%E3%81%AB%E3%82%88%E3%82%8A

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