U.N. Secretary-General Antonio Guterres will attend a ceremony in Nagasaki next week to mark the 73rd anniversary of the U.S. atomic bombing of the city.
Japan and Russia have agreed to cooperate on their shared goal of denuclearizing North Korea.
The South Korean government says the 2 Koreas have agreed on some steps to ease the tensions on the Peninsula, including a plan to withdraw some troops from border guard posts on a trial basis.