“Japan will turn over hundreds of kilograms of sensitive atomic material of potential use in bombs to the United States to be downgraded and disposed of, the two countries’ leaders said ahead of a nuclear security summit on Monday. China had voiced concern earlier this year about Japan’s holding of plutonium but Washington and the United Nations nuclear agency in Vienna have made it clear they are not worried about the way Tokyo is handling the issue.”
Source: U.S. to help in ‘eliminating’ sensitive Japanese nuclear stockpile | Reuters