By Arshad Mohammed
TOKYO (Reuters) - Secretary of State John Kerry defended the reorientation of Washington's foreign policy toward Asia on Monday as he ended a trip to the region dominated by concerns about North Korea's nuclear programs.
The "rebalancing" of the United States toward Asia has caused unease in Beijing, which has tended to focus on the military dimensions of the strategy and to view it as a way to contain China's rise.
On the final leg of a 10-day trip that included stops in Seoul and Beijing, Kerry sought to assuage Chinese concerns even as he offered reassurance to U.S. allies such as Japan and South Korea that the United States wasn't going anywhere.
"Some people might be skeptical of America's commitment to this region," Kerry told students at the Tokyo Institute of Technology. "My commitment to you is that as a Pacific nation that takes our Pacific partnership seriously, we will continue to build on our active and enduring presence."
The United States has beefed up its military presence in the region in recent weeks, deploying two missile defense systems following repeated North Korean threats to attack the United States and its allies.
The North increased its menacing language after the U.N. Security Council imposed new sanctions in response to its latest nuclear arms test - its third - in February. Speculation has mounted of a new missile launch or nuclear test.
Kerry has stressed his interest in a diplomatic solution.
"The United States remains open to authentic and credible negotiations on denuclearization, but the burden is on Pyongyang," he said. "North Korea must take meaningful steps to show that it will honor commitments it has already made, and it has to observe laws and the norms of international behavior."
On Sunday evening, however, Kerry appeared to open the door to talking without requiring the North to take denuclearization steps in advance. Beijing, he said, could be an intermediary.
"If the Chinese came to us and said, 'look, here's what we've got cooking and so forth,' I'm not going to tell you that I'm shutting the door today to something that's logical and that might have a chance of success," he said.
Denuclearization, he told ABC News in an interview, "means you strip down your current enrichment facilities and production facilities, and make it clear you will be a non-nuclear state."
If North Korean leader Kim Jong-un does agree to stop trying to build his nuclear arsenal, peace talks can reopen, Kerry said in a separate interview.
"If he will meet the obligations that we've all set out that are necessary, we are prepared to negotiate on a full range of issues," Kerry told CBS.
While signaling U.S. support for its Asian allies, Kerry also said in a speech that he did not want territorial disputes between Japan and China to jeopardize the region's security and prosperity.
"It is time also to put long-festering territorial pursuits behind us," he said. "The stakes are far too high and the global economy is too fragile for anyone to allow these inherited problems to divide the region and to inflame it."
Tensions between the two nations soared last year over rival claims to a crop of islands in the East China Sea.
(Editing by Raju Gopalakrishnan and Christopher Wilson)
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