Foreign Minister Katsuya Okada is expected to hold talks with U.S. Secretary of State Hillary Rodham Clinton on Friday afternoon in Hanoi, instead of Thursday as tentatively scheduled, a senior Foreign Ministry official said Wednesday.

The bilateral talks, to be held on the sidelines of Friday's ministerial meeting of the Association of South-East Asian Nations Regional Forum, have been pushed back due to a scheduling conflict, the official said.

During the talks, the two are expected to discuss tensions on the Korean Peninsula following the deadly sinking of a South Korean warship in March that Seoul blames on Pyongyang, as well as cooperation in rebuilding Afghanistan.