Government officials said they will continue to seek support at international gatherings for Japan's proposal that world leaders visit Hiroshima and Nagasaki after a U.N. nuclear disarmament conference ended last week without issuing a consensus document.

During the month-long Nuclear Non-Proliferation Treaty review conference in New York, Japan sought to include in the outcome document a reference to Tokyo's invitation to world leaders to visit the two atomic-bombed cities to raise awareness of the catastrophic consequences of using nuclear weapons.

But the proposal was watered down in the face of opposition from China, which said Tokyo was trying to portray itself as a war victim.