Japan's government is stressing the negative impact of a speedy exit from atomic energy as it nears a decision on a new energy mix. They are buffeted by conflicting pressure from anti-nuclear voters and pro-nuclear business interests. Japan is rethinking its whole energy policy after an earthquake and tsunami damaged the Fukushima nuclear power plant in March last year. Defining nuclear power's role has become a hot button issue for Prime Minister Yoshihiko Noda.