A top U.S. diplomat expressed hope Friday that an upcoming meeting of the foreign ministers of Japan, South Korea and China could lead to their first trilateral summit despite icy relations in the region.

"Plans are afoot for a three-way ministerial to be held in Korea next month with the expectation of a summit to follow," Undersecretary of State Wendy Sherman told an event in Washington.

Sherman said that when she visited the three Asian countries in November, she was impressed by their efforts — "some in public, and some behind the scenes" — to bring the ministerial talks to fruition in March.