Executive Summary

Vena Energy is the renewable power arm of Vena Group. Its renewable pipeline stands at 30.5 GW of solar and wind, as of the end of December 2025. It also reports a 26.2 GWh battery storage pipeline within its green energy infrastructure plans.  

 Vena Energy has been selected in Japan's Long-Term Decarbonization Power Source Auction. The winning project is NRE Nakagawa Daini, a grid-connected battery. The auction is run by the Organization for Cross-regional Coordination of Transmission Operators, known as OCCTO.  

The awarded capacity is 46,828 kW, or about 46.8 MW. The battery will be located near Matsumoto City in Nagano Prefecture. It is described as a grid-scale storage project.  

The auction scheme began in fiscal 2023. It was created to encourage new investment in decarbonized power sources. Its main goal is to give developers more certainty over long-term investment returns. The scheme is tied to Japan's 2050 carbon neutrality target. 

Nakagawa Daini follows Vena Energy's Hikone battery in Shiga Prefecture. Hikone has an output of 2.0 MW. It began commercial operation last year. The new project is more than 23 times larger in output. 

Raul Rienda, Vena Energy's Japan representative, commented on the result. He said batteries are needed to bring in more renewable energy. In his view, they help manage output swings and make better use of power. He said the selection lets the company support grid stability in Japan. He also said development will proceed through dialogue with local communities. Care for the surrounding environment will come first.