Spent fuel emerges as weak point in Japan's nuclear renaissance

Japan's push to restart its nuclear power fleet faces a critical bottleneck: the management of spent nuclear fuel. With 17 reactors currently in restart process and more planned, the country's storage capacity for spent fuel is nearing its limit. The issue is most acute at Fukushima Daiichi, where the 2011 meltdown left behind massive amounts of contaminated debris and spent fuel that must be safely removed. The government and utilities are exploring options including dry cask storage and reprocessing, but local opposition and regulatory hurdles slow progress. Without a clear solution, the nuclear renaissance—a key pillar of Japan's energy security and decarbonization goals—could stall.

Global Impact

Japan's spent fuel challenge has significant economic and environmental dimensions. Economically, delayed restarts mean higher fossil fuel imports, worsening Japan's trade deficit and keeping global LNG markets tighter.