TOKYO - US President Barack Obama will use a state visit to Japan on Thursday to try to reassure Asian allies of his commitment to ramping up US engagement in the region, despite Chinese complaints that his real aim is to contain Beijing's rise.
Obama is being treated to a display of pomp and ceremony meant to show that the US-Japan alliance, the main pillar of America's security strategy in Asia, remains solid at a time of rising tensions over growing Chinese assertiveness and North Korean nuclear threats.
US and Japanese trade negotiators for the two countries were working around the clock in Tokyo on a two-way trade pact seen as crucial to a broader trans-Pacific agreement.
"We're continuing to work," a US official said on Thursday, before the leaders were to meet on the first state visit to Japan by a US president in 18 years.
"Autos and agriculture continue to be the focus, and our goal remains to achieve meaningful market access for American businesses, farmers and ranchers," the official said. "We've made some progress and worked around the clock."
Even if Obama and Japanese Prime Minister Shinzo Abe cannot complete a bilateral trade deal before the US president leaves Tokyo on Friday, they are likely to try to project a sense of progress on key issues.
The challenge for Obama during his week-long, four-nation tour will be to convince Asian partners that Washington is serious about its promised strategic "pivot" towards the region, while at the same time not harming US ties with China, the world's second-biggest economy.
The difficulty of Obama's balancing act was underscored hours before he arrived on Wednesday night when Chinese state media criticised US policy in the region as "a carefully calculated scheme to cage the rapidly developing Asian giant".
The official Xinhua news agency followed that on Thursday with a commentary that said: "...the pomp and circumstance Obama receives... cannot conceal the fact that Tokyo has become a growing liability to Washington's pursuit of long-term interests."
Obama told Japan's Yomiuri newspaper that while Washington welcomed China's peaceful rise, "our engagement with China does not and will not come at the expense of Japan or any other ally".
An Obama-Abe joint statement is likely to specify that tiny islands in the East China Sea, claimed by Beijing, are administered by Japan and fall under the US-Japan treaty that obliges Washington to defend Tokyo, Japanese media said on Thursday.
This is standard US policy, but putting Obama's name to such a statement would reassure Japan on an issue that is a source of tension between Asia's biggest powers.
Obama's trip will also include stops in South Korea, Malaysia and the Philippines. Leaders who will meet Obama are also keeping a wary eye on the crisis in Ukraine through the prism of their own territorial disputes with Beijing.
Some of China's neighbours worry that Obama's apparent inability to rein in Russia, which annexed Crimea last month, could send a message of weakness to China.