Japan and the United States agreed Saturday that the two governments should hold a trilateral meeting with South Korea "at the earliest date" to discuss how to deal with the North Korean nuclear crisis, Japanese officials said.

The meeting may take the form of a session of the Trilateral Coordination and Oversight Group, a sub-Cabinet level meeting of the three countries, the officials said.

U.S. Assistant Secretary of State James Kelly stopped in Japan on his way back to the U.S. on Saturday. He provided Japanese government officials with details of a three-day meeting that ended Friday in Beijing among the U.S., North Korea and China to discuss the nuclear standoff.