The batteries will offer 20MWh to 30MWh of storage capacity, The Nikkei said this week, without citing sources.
The Ministry of Economy, Trade and Industry (METI) will reportedly provide as much as ¥31.7bn ($265.4m) in funding to support the project.
In April 2013, METI invested ¥29.6bn to help regional utility Hokkaido Electric Power install a 60MWh battery bank at a substation in northern Japan.
In
