Misaki Mirai Holdings Begins Participation in Supply-Demand Adjustment Market with "MSK Imari Power Storage Plant" in Imari City, Saga Prefecture

Misaki Mirai Holdings Co., Ltd. (Headquarters: Shibuya-ku, Tokyo; Representative: Yuta Misaki) is pleased to announce that its "MSK Imari Power Storage Plant" (output: 2MW / capacity: 8MWh), located in Higashiyamashiro-cho, Imari City, Saga Prefecture, commenced participation in the supply-demand adjustment market (primary adjustment capability offline) on April 1, 2026.

The MSK Imari Power Storage Plant was completed in December 2025 and has been operating in the wholesale electricity market since January 2026. With its recent entry into the supply-demand adjustment market, it will now transition to a more full-scale operational phase.

This project is the first grid-scale storage battery initiative within our energy business, serving as a foundation for future business expansion.

Starting with this project, our company aims to form a business group centered on grid-scale and other storage battery businesses, striving for further enhancement of corporate value. Through this, we will contribute to society by stabilizing electricity supply and demand.

**■ About MSK Imari Power Storage Plant**

The MSK Imari Power Storage Plant is a crucial first project in our energy business, anticipating future developments. Having already commenced operations in the wholesale electricity market, its entry into the supply-demand adjustment market will further expand the scope of transactions and operations utilizing storage batteries.

In the future, we also plan to address the capacity market. Through operations in multiple markets, we will accumulate knowledge and achievements in the storage battery business, aiming to expand our energy business domain.

**■ Future Outlook**

Our company will proceed with the formation of a business group centered on grid-scale and other storage battery businesses, starting with the MSK Imari Power Storage Plant.

We aim to achieve sustainable growth and enhance corporate value by contributing to the stabilization of electricity supply and demand, while balancing social significance and business viability.

**■ Facility Overview**

Facility Name: MSK Imari Power Storage Plant Location: Higashiyamashiro-cho, Imari City, Saga Prefecture Output: 2MW / Capacity: 8MWh Transaction Operations: Wholesale electricity market (from January 2026), Supply-demand adjustment market (from April 2026), Capacity market (planned for future)

**■ Company Overview**

Company Name: Misaki Mirai Holdings Co., Ltd. Location: Shibuya Center Place 2F, 1-16-3 Dogenzaka, Shibuya-ku, Tokyo 153-0043 Representative: Yuta Misaki, Representative Director Business Activities: Real estate related business / Energy business / Media and content business / Group business management URL: (URL was truncated in the original text)