Power plantPower & energy

Hexa Energy Service to build 49.7MW grid-scale battery storage plant in Fukushima, secures long-term offtake with Tokyo Gas

Hexa Energy Service LLCFukushimaPublished Jul 28, 2026

InvestmentNot disclosed

PhasePlanned

Start—

CompletionMar 2030

To completion

Today

2027202820292030

About 41 months to scheduled completion.

Hexa Energy Service, a Japan-based unit of I Squared Capital, has signed a 20-year long-term offtake agreement with Tokyo Gas for a grid-scale battery storage facility it is developing in Fukushima Prefecture. Hexa will develop, own and maintain the facility while Tokyo Gas will operate it, trading in electricity markets; commercial operation is planned for FY2029.

Project facts

Owner: Hexa Energy Service LLC
Facility: Power plant
Sector: Power & energy
Location: Fukushima, Japan
Investment: Not disclosed
Scale / capacity: 49.7 MW output / 202.1 MWh capacity
Completion: Mar 2030
Announced: Jul 28, 2026
Themes: power-grid, renewable-energy

Figures and schedules are as announced by the company or the public body concerned; plans can change. Amounts that were not disclosed are recorded as not disclosed, never estimated.

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