Japan needs to import about 90% of its energy requirements. Its first commercial nuclear power reactor began operating in mid-1966, and nuclear energy has been a national strategic priority since 1973. This came under review following the 2011 Fukushima accident but has been confirmed. Up until 2011, Japan was generating some 30% of electricity from its reactors, which was expected to increase to at least 40% by 2017. The plan is now for at least 20% by 2030 from a depleted fleet. The first two reactors restarted in August and October 2015, with a further eight having restarted since. 16 reactors are currently in the process of restart approval.