Establishment of Joint Venture 'M&K Energy' to Promote Grid-Scale Battery Storage Business
Matsuo Sangyo and Cygnus Sekiyu have jointly established 'M&K Energy' to operate a grid-scale battery station. Operations in Gunma Prefecture will begin in May 2026 to stabilize the power grid.
📋 Article Processing Timeline
- 📰 Published: April 10, 2026 at 20:00
- 🔍 Collected: April 11, 2026 at 00:25 (4h 25m after Published)
- 🤖 AI Analyzed: April 20, 2026 at 02:29 (218h 3m after Collected)
Matsuo Sangyo Co., Ltd. (Headquarters: Osaka City, Osaka Prefecture, President and CEO: Naoki Matsuo | hereinafter "Matsuo Sangyo") and Cygnus Sekiyu K.K. (Headquarters: Chiyoda-ku, Tokyo, President and CEO: Masahiro Wakazawa | hereinafter "Cygnus") have agreed to establish a joint venture, M&K Energy LLC (hereinafter "M&K Energy"), to jointly operate a grid-scale battery station, and held a signing ceremony on April 9, 2026. Through this initiative, both companies aim to contribute to the stabilization of the power grid, which is becoming increasingly important with the expanding introduction of renewable energy, and to create new energy businesses based on storage batteries.
Background
In recent years, due to the occurrence of grid congestion and output curtailment accompanying the expanded use of renewable energy, expectations for grid-scale storage batteries that adjust power supply and demand and contribute to a stable power supply have been growing year by year. Furthermore, in Japan, the development of capacity markets and supply-demand adjustment markets is progressing, expanding opportunities for power businesses utilizing storage batteries. Given this background, M&K Energy will accumulate expertise through actual operations in the supply-demand adjustment market and proceed to establish a revenue model for future business expansion.
Matsuo Sangyo has been considering this business, recognizing that grid-scale battery stations are a crucial initiative that promotes the effective use of renewable energy and contributes to a stable energy supply and the realization of a decarbonized society. At the same time, we see great potential in leveraging the knowledge we have cultivated in the renewable energy sector and our technological capabilities in selecting, constructing, and operating battery storage systems, which will lead to the creation of new business opportunities. In this initiative, by combining Matsuo Sangyo's technical expertise with Cygnus's business foundation and customer network, we will proceed with collaboration aimed at establishing a sustainable energy business and its future expansion.
Grid-Scale Battery Station Overview
Location: Oura District, Gunma Prefecture
Commercial Operation Start: May 2026
Adopted Battery: Gotion
Power Output: Approx. 2MW
Battery Capacity: Approx. 8MWh
Inquiries Regarding the Grid-Scale Battery Business
For personnel considering the introduction or operation of grid-scale storage batteries, please feel free to contact us below.
Matsuo Sangyo Co., Ltd. Energy Solutions Division
Background
In recent years, due to the occurrence of grid congestion and output curtailment accompanying the expanded use of renewable energy, expectations for grid-scale storage batteries that adjust power supply and demand and contribute to a stable power supply have been growing year by year. Furthermore, in Japan, the development of capacity markets and supply-demand adjustment markets is progressing, expanding opportunities for power businesses utilizing storage batteries. Given this background, M&K Energy will accumulate expertise through actual operations in the supply-demand adjustment market and proceed to establish a revenue model for future business expansion.
Matsuo Sangyo has been considering this business, recognizing that grid-scale battery stations are a crucial initiative that promotes the effective use of renewable energy and contributes to a stable energy supply and the realization of a decarbonized society. At the same time, we see great potential in leveraging the knowledge we have cultivated in the renewable energy sector and our technological capabilities in selecting, constructing, and operating battery storage systems, which will lead to the creation of new business opportunities. In this initiative, by combining Matsuo Sangyo's technical expertise with Cygnus's business foundation and customer network, we will proceed with collaboration aimed at establishing a sustainable energy business and its future expansion.
Grid-Scale Battery Station Overview
Location: Oura District, Gunma Prefecture
Commercial Operation Start: May 2026
Adopted Battery: Gotion
Power Output: Approx. 2MW
Battery Capacity: Approx. 8MWh
Inquiries Regarding the Grid-Scale Battery Business
For personnel considering the introduction or operation of grid-scale storage batteries, please feel free to contact us below.
Matsuo Sangyo Co., Ltd. Energy Solutions Division