Vuk Jeremic, president of the U.N. General Assembly, plans to attend the annual peace memorial ceremony in Hiroshima on Aug. 6, he told Kyodo News on Thursday.
"I'm honored," Jeremic said of his visit to one of the two Japanese cities hit by U.S. nuclear bombs in August 1945.
He added that an annual visit by a U.N. secretary general or a general assembly president to the bombed sites should be "fixed."
Jeremic from Serbia will also hold talks with senior government officials in Tokyo during his stay in Japan.
In 2010, U.N. Secretary General Ban Ki Moon became the first U.N. chief to attend the Hiroshima ceremony, but he has not attended it since.
Jeremic's predecessor, Nassir Abdulaziz Al-Nasser, visited Japan in November 2011 shortly after he took the post, but did not visit Hiroshima at that time.
The atomic bomb was dropped on Hiroshima on Aug. 6 and on Nagasaki three days later.