Senior officials from Japan, South Korea and the United States are planning to meet in Washington in early July to discuss strategies aimed at dealing with North Korea's suspected nuclear weapons program, a senior Foreign Ministry official said Wednesday.

During a similar trilateral meeting earlier this month in Honolulu, Japan submitted a comprehensive proposal on future diplomatic strategies regarding the North, the official said without elaborating.

South Korea and the U.S. are currently mapping out their versions, with these proposals expected to be discussed at the forthcoming meeting, the official said.

North Korea, the U.S. and China held talks in April over the nuclear issue.

The U.S. is urging North Korea to allow Japan and South Korea to attend the next meeting, which has yet to be fixed.