LS Electric and Hyosung Heavy Industries Actively Entering Japanese ESS Market

Renewable energy growing rapidly by 35% annually
Expanding business into construction and operation

Domestic power-equipment manufacturers have set out to target the Japanese energy storage system (ESS) market, where power demand driven by artificial intelligence (AI) is increasing and renewable energy generation is expanding. They are broadening their scope beyond simple equipment supply to provide comprehensive solutions, including engineering, procurement, and construction (EPC) and operation and maintenance (O&M).

According to global market research firm Grand View Research, the Japanese ESS market, valued at approximately USD 13.4 billion (KRW 20.215 trillion) in 2025, is projected to grow at an average annual rate of 34.9 percent until 2030.
As the local market expands, domestic companies are also accelerating their entry into the Japanese market, LS Electric, which built the Hokkaido ‘Chitose Solar Power Plant’ in 2017, Japan’s first renewable energy power plant integrating solar power and ESS, constructed grid-connected ESS power plants in Kyushu in 2022 and in Watari-gun, Miyagi Prefecture in 2025. Grid-connected ESS power plants are a method of storing electricity generated from renewable-energy sources by connecting them to the power grid and supplying power when needed.
In addition, LS Electric is building a grid-connected energy storage system (ESS) plant, featuring a 2MW battery output and an 8MWh capacity, in Ichihara City, Chiba Prefecture, Japan. This project is LS Electric’s first direct investment and operation in Japan, and the company plans to expand its scope to cover the entire ESS business cycle, from investment and operation to power trading.
Hyosung Heavy Industries entered the Japanese market last February by securing a 48.5MW, 228MWh ultra-high voltage ESS EPC project in the Shiranuka region of Hokkaido. In addition, having signed an ESS EPC project contract worth approximately KRW 11 billion with a local energy developer last month, the company will construct 40MWh high-voltage ESSs in five locations, namely, Oita, Kumamoto, Yamaguchi, Okayama and Mie.

 
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