Ten years after the Fukushima nuclear disaster, Japan has restarted nine of its nuclear reactors, a number that may more than triple this decade according to current government goals.

Fatih Birol, the executive director of the International Energy Agency (IEA), suggested that is a major achievement as he on Thursday presented the body's latest policy review on Japan.

“The Japanese energy sector recovered from the damage in the right way,” Birol said, adding that the island nation in the decade after the nuclear meltdown avoided disruptions like major black outs.