Project Shibushi

Project Shibushi is a 2 MW/8 MWh grid-scale battery energy storage system supporting Japan's power transition in Kyushu.

Location: Shibushi City, Kyushu

Capacity: 2 MW / 8 MWh

Operating life: ~20 years

Technology: Lithium Iron Phosphate (LFP)

Status: Commercial Operations

COD: April 2026

Overview

Project Shibushi is a high-voltage, utility-scale battery energy storage system (BESS) located in Shibushi City, Kagoshima Prefecture. The project has an installed power capacity of 2 MW with a 4-hour energy duration, providing flexible, grid-connected storage to support system stability, and renewable usage in the Kyushu region. Project Shibushi began trading on JEPX in April 2026, with balancing market participation expected by end-July 2026.

Development

Project Shibushi is Manoa Energy’s first fully in-house greenfield HV project to be delivered to COD, representing a significant milestone achieved through the successful completion of the following key stages:

• Land acquisition

• Permitting

• Utility Interconnection agreements

• Execution of the EPC contract and progression into the construction phase

• Aggregator contracting in preparation for participation in Japan’s electricity markets

• Negotiation of Operations and Maintenance (O&M) scope and commercial terms to support long-term operational performance

• Project delivery management and stakeholder coordination through to commercial operation

Construction Management

Beyond development, Manoa Energy is serving as the construction manager, overseeing execution up to commercial operation. Shibushi is a flagship example of Manoa’s end-to-end development approach—from acquisition and permitting, to BESS procurement and construction oversight.

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