Since the 2011 onset of the Fukushima nuclear disaster, Japan has had to drastically revise an energy policy that had long heralded atomic power as its main source of energy.

The new energy policy announced in April outlines plans to decrease Japan's nuclear dependence as much as possible, while boosting renewable energy sources.

At the same time, it also says the government will promote the use of hydrogen to pave the way for a "hydrogen society."