TOKYO: Japan will speed up its review of a deal to move a major U.S. military base on the island of Okinawa, officials said Thursday, but no final decision was expected in time for President Barack Obama's visit to Tokyo next week.

To smooth the way for the visit, Assistant Secretary of State Kurt Campbell, Washington's top envoy in Asia, was in Tokyo to meet with Japanese Foreign Minister Katsuya Okada to discuss the leaders' agenda.

"We are making our best efforts to find the most appropriate solutions to the base allocation issue," Foreign Ministry spokesman Yasuhisa Kawamura said Thursday. "We are accelerating the review process."

He said, however, he could not say when a decision might be announced.

Although the leaders are expected to discuss a broad range of issues, from climate change to Japan's assistance to Afghanistan, the base issue is likely to dominate during Obama's visit from Nov. 12-13.

Washington and Tokyo agreed under Japan's previous administration that the Marine Corps Air Station Futenma would be relocated to another part of Okinawa, and 8,000 Marines transferred from Okinawa to the U.S. territory of Guam by 2014. Japan's new government, however, has not yet committed to the deal.

Prime Minister Yukio Hatoyama suggested before he took office in September that the base should be moved off Okinawa, but the U.S. wants it relocated to a less crowded area of the island.

Asked if he is frustrated by Japan's foot-dragging on Futenma, Campbell said, "not at all."

"We are here to make some preparations for President Obama's visit to Tokyo next week," he said.

The United States has about 47,000 troops in Japan under a mutual security pact.