On a rainy midwinter day, Taro Yamamoto stood with a small group of people in front of Shimokitazawa Station in Tokyo¡¯s Setagaya Ward and addressed passers-by in that artsy youth-culture hub.

¡°I am an actor ¡ª Taro Yamamoto,¡± he announced. ¡°And I would like to ask you to add your signature to a petition we are putting together that calls for a local vote on nuclear power plants.¡±

The 37-year-old went on to explain that the campaign aims to get the signatures of 214,236 of Tokyo¡¯s eligible voters (one 50th of the total). Members of the Tokyo Metropolitan Government Assembly would then be legally bound to vote on whether to hold a referendum among the citizens within its jurisdiction, asking if Tokyo Electric Power Co. ¡ª operator of the crippled Fukushima No. 1 nuclear power plant ¡ª should be allowed to run such facilities or not.