Japanese Prime Minister Shinzo Abe on Sunday marked the 70th anniversary of the atomic bombing of Nagasaki by renewing his commitment to a nuclear weapons free Japan, following criticism for not making the same pledge on the anniversary of the Hiroshima bombing last week. "As the only nation in the world to have suffered a war-time nuclear attack, I have renewed my resolve to play a leading role in pursuing a world without nuclear weapons and maintain the three non-nuclear principles," Abe said in Nagasaki Peace Park. The "three non-nuclear principles" are Japan's long-standing policy of not possessing or producing nuclear arms and not letting others bring them into the country.