The Japanese city of Hiroshima is marking the 74th anniversary of the world's first atomic bombing.
A ceremony will begin at 8 a.m. on Tuesday at Peace Memorial Park. Prime Minister Shinzo Abe is scheduled to attend.
Representatives from 92 countries will also take part. That's the second highest number ever.
A list of 319,186 victims of the bombing will be placed inside a cenotaph. The list includes the names of people who died during the past twelve months.
Participants will offer a silent prayer at 8:15 a.m., the time the atomic bomb was dropped on August 6, 1945.
The event comes amid growing uncertainty over prospects for achieving a nuclear-free world.
A landmark nuclear arms control treaty, signed three decades ago between the US and the former Soviet Union, expired last Friday. The Intermediate-Range Nuclear Forces Treaty, or INF, was an important pillar of nuclear disarmament.
Hiroshima is stepping up efforts to keep the memories of the calamity alive, as the survivors of the bombing, known as hibakusha, get older.
In April, the city's Peace Memorial Museum overhauled an exhibit of memorabilia from the bombing for the first time in 28 years.
Hiroshima Mayor Kazumi Matsui will deliver a peace declaration at the ceremony.
He is expected to call on the Japanese government to heed the voices of the hibakusha who wish to see Japan join a UN treaty that bans nuclear weapons.