Marking the 80th anniversary of US' atomic bombing of Japan's Hiroshima, Mayor Kazumi Matsui has called on world leaders to abandon nuclear deterrence. "[Developments in Ukraine and Middle East]...flagrantly disregard the lessons the international community should have learned from the tragedies of history," he said. Over 1.4 lakh people died in Hiroshima and 74,000 others were killed in Nagasaki.