Over the past quarter century, Osaka has been responsible for generating the largest percentage of nuclear waste of any prefecture in the nation, a new study has revealed.

Green Action, a Kyoto-based environmental group led by noted activist Aileen Smith, announced March 10 the results of a nationwide study on the buildup of waste from nuclear reactors generating electricity. The survey was carried out by Smith and 50 other groups across the nation, including the YMCA, the National Christian Coalition and environmental bodies.

According to the report, between 1970 and 1996, nuclear plants owned by Kansai Electric Power and providing electricity to Osaka Prefecture were responsible for generating 12.44 percent of the nation's nuclear waste, the largest percentage of any prefecture.