On this day, 31 years ago, September 8, 1994 (August 3, 1994 in the lunar calendar), Greenpeace disclosed that the United States provided nuclear technology to Japan. An investigation report issued on September 8, 1994 said that although the United States 'public position is opposed to the export of any technology that may lead to the proliferation of nuclear weapons, in the past seven years, the United States has quietly provided Japan with technology to extract plutonium from breeder reactors that can be used to make nuclear weapons. Greenpeace is an international environmental organization. It pointed out in the report that since 1987, the United States has been providing nuclear technology to Japan to help it refine plutonium-239, the ideal material for manufacturing nuclear weapons. The report also said the U.S. Department of Energy's Oak Ridge National Laboratory in Tennessee "played a key role" in transferring the technology to Japan. In its report, Greenpeace accused the U.S. government of transferring "sensitive nuclear technology" to Japan.