TOKYO (Reuters) - Japan edged closer to its first nuclear power plant restart since the March earthquake following approval from a Japanese city mayor, but concerns about summer power shortages remained as it was unclear when other plants would follow suit.
Delays in reactor restarts, combined with the shutdown of tsunami-hit plants, have left Japan with only 19 of its 54 reactors still operating. Before the tsunami-triggered atomic crisis, nuclear power provided about 30 percent of Japan's electricity.
