Japan will radically change its energy policy to lessen dependence on fossil fuels and nuclear power by setting a new goal of generating 20 percent of its electricity from renewable resources in the 2020s, Prime Minister Naoto Kan said Wednesday.

"Japan will now review its basic energy plan from scratch and is set to address new challenges," Kan said at a forum dedicated to the 50th anniversary of the Organization for Economic Cooperation and Development in Paris.

His remark came ahead of the two-day Group of Eight summit in Deauville, which kicked off Thursday with a working lunch that was dominated by Japan's nuclear crisis.