Sanctions imposed on North Korea by the U.N. Security Council will remain in place until Pyongyang returns to the six-party talks and halts its nuclear programs, Foreign Minister Katsuya Okada and his South Korean counterpart, Yu Myung Hwan, said Tuesday.

Following a trilateral foreign ministerial meeting in Shanghai on Monday with his opposite numbers from China and South Korea, Okada met with Yu in Tokyo for bilateral talks.

"Japan, South Korea and the United States will coordinate closely and carefully" on the Pyongyang nuclear threat, Okada said at a news conference.