Japanese spending on imported fossil fuels soared in the latter part of last year, helping push the country to a trade deficit for the second year in a row. Emissions targets are under revision as most nuclear power plants remain closed.
The most sustainable national power systems in the world combine nuclear with hydro for mass low-carbon generation, a World Energy Council study shows.
An OECD report has highlighted the contribution nuclear already makes to the energy mix as well as how it can fit into future low-carbon networks. The report is aimed at informing the policymaking of the body's member governments.