China concerned by reports of Japan holding weapons-grade plutonium

China said on Monday it was “extremely concerned” by a report that Japan has resisted returning to the United States more than 300kg of mostly weapons-grade plutonium, the latest dispute between the two Asian neighbours.

Japan’s Kyodo news agency said that Washington had pressed Japan to give back the nuclear material which could be used to make up to 50 nuclear bombs. Japan had resisted, but finally given in to US demands, it added. Continue reading