TOKYO — A day after she placed flowers at the funeral altar of Shinzo Abe, the assassinated former Japanese prime minister, Vice President Kamala Harris traded the solemn setting of the state ceremony for the Yokosuka naval base south of Tokyo, where she took aim at China’s aggression toward Taiwan.
“China has challenged freedom of the seas. China has flexed its military and economic might to coerce and intimidate its neighbors,” Ms. Harris said on Wednesday while speaking to American sailors on board the Howard, a naval destroyer. “And we have witnessed disturbing behavior in the East China Sea and in the South China Sea, and most recently, provocations across the Taiwan Strait.”
What on the surface appeared to be a routine, symbolic trip for the vice president has become a tricky dance of diplomacy in a region increasingly unnerved by military advances by North Korea and China.
Just days after North Korea test-launched a short-range ballistic missile off its east coast, Ms. Harris committed to making a stop on Thursday at the Demilitarized Zone separating the two Koreas. Meeting with frustrated representatives from South Korea hours before Mr. Abe’s funeral, Ms. Harris defended legislation approved by Congress that excludes electric vehicles built outside North America from tax credits, according to a senior administration official.
And in a region walking a tightrope on China, Ms. Harris affirmed the administration’s support for Taiwan, a week and a half after President Biden appeared once again to move beyond a policy of “strategic ambiguity” by saying the United States would defend the island if China invaded.
“We will continue to oppose any unilateral change to the status quo,” Ms. Harris said, “and we will continue to support Taiwan’s self-defense, consistent with our longstanding policy.”
The question of how far the United States would go to defend Taiwan has grown only more urgent among allies in the region after China responded to Speaker Nancy Pelosi’s visit to the island last month by conducting its most extensive drills ever in the air and waters around Taiwan.
While Ms. Harris’s aides denied that Mr. Biden’s comments earlier this month on Taiwan had affected their meetings with leaders from Japan, Australia and South Korea, a senior official did say that China’s response to Ms. Pelosi’s visit was a focus of their discussions.
“Biden’s most recent statements and his previous ones about Taiwan have kept the China-Taiwan issue at the top of the regional agenda,” said Evan Medeiros, a Georgetown University professor who was senior Asia director at the White House National Security Council in the Obama administration.
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“It matters to U.S. allies and policymakers throughout Asia who are asking the key question: What’s the line between deterrence and provocation?” he added. “And no one knows where that line is, and exploring those boundaries is complicated business.”
Ms. Harris underlined the administration’s focus on China and Taiwan while addressing the sailors aboard the Howard, accusing Beijing of seizing on Ms. Pelosi’s Taiwan visit to conduct an “unprecedented show of military force, a pressure campaign against Taiwan, a series of destabilizing actions.”
She listed examples of growing threats for the gathered sailors, noting Russia’s invasion of Ukraine, North Korea’s test launch and China’s “undermining key elements of the international rules-based order.” When Ms. Harris last accused China of aggressive tactics in the South China Sea, Beijing responded by accusing the United States of provoking tensions in the region.
It is not the first time Ms. Harris has encountered a maze of challenges in pursuit of bolstering her foreign policy bona fides as the Biden administration faces low approval ratings back home.
Last year, during her first visit to Asia as vice president, Ms. Harris faced questions about the historical parallel between the U.S. evacuation of American citizens in 1975 from Saigon, Vietnam, and the scenes of desperate Afghans running behind U.S. military planes as the Taliban took control of Kabul after the withdrawal of American forces.
She visited Emmanuel Macron, the French president, weeks after the United States and Australia kept Paris in the dark over a plan to build nuclear-powered submarines, a deal that France called a “betrayal” of an existing agreement to buy conventional French-made subs.
While visiting Guatemala, she demanded that asylum seekers “do not come” to the United States as the administration faced increasing criticism over maintaining a Trump-era policy of turning back migrants amid surging illegal crossings at the U.S.-Mexico border.
Ms. Harris appeared to confront controversy again this week in Japan. Her attendance at the state funeral came as thousands of protesters took to the streets to oppose the event, calling it a waste of public money and a unilaterally imposed celebration of a divisive leader.
Aaron Connelly, a research fellow at the International Institute for Strategic Studies in Singapore, said the administration’s decision to send Ms. Harris to the funeral just eight days after the president attended the funeral for Queen Elizabeth II risked undermining the administration’s stated priority of shoring up alliances in the Indo-Pacific region to counter China.
“This is an interesting moment of comparison where Biden dropped everything to go to Queen Elizabeth’s funeral and kind of sit in the back of the abbey with other countries’ leaders,” Mr. Connelly said. “The fact Shinzo Abe only gets the vice president,” he added, “shows America is kind of trapped in this Atlanticist perspective and we can’t really shift our view.”
But that did not mean America’s Asian allies were not eager to address with Ms. Harris the military challenges posed by China and North Korea.
Almost immediately after arriving in Tokyo on Monday, Ms. Harris called the United States’ alliance with Japan, which is pushing to drastically expand its military spending, a “cornerstone” of peace in the region. On Tuesday, after he broke the news that Ms. Harris would become the first high-ranking Biden administration official to visit the DMZ, the South Korean prime minister, Han Duck-soo, made clear his own nation’s anxieties over North Korea’s nuclear capabilities.
“It was very rare that some country is actually making explicit how they will use nuclear, you know, nuclear ambitions in such an explicit way,” Mr. Han said, referring to a new law adopted in North Korea saying the country will launch a nuclear attack if the United States or South Korea threatens its leader’s hold on power.
“We should really go into real cooperation and work together in making a really effective deterrence to the possible provocations of the North Koreans,” Mr. Han added.
The U.S. aircraft carrier Ronald Reagan arrived in Busan, a port in the southeast of South Korea, earlier this month for a joint exercise with the South Korean military. Just days later, North Korea conducted its first ballistic missile test in nearly four months.
But while the two nations recommitted to working to deter the North, one of the signature achievements of Mr. Biden’s domestic agenda has become a source of tension.
A senior official traveling with Ms. Harris said that South Korean representatives had expressed concerns about Mr. Biden’s Inflation Reduction Act, which provides tax credits for American buyers of electric vehicles made in North America.
South Korean leaders have felt “betrayed” by the law, particularly after Mr. Biden joined the chairman of Hyundai earlier this year in Seoul to celebrate the South Korean company’s investment in a new electric vehicle and battery manufacturing facility in Savannah, Ga., said Frank Aum, a senior expert on Northeast Asia at the U.S. Institute of Peace.
“That’s one of the issues of tension right now,” Mr. Aum said.
Ms. Harris is expected to further discuss the issue with Yoon Suk Yeol, the president of South Korea, during her visit to Seoul on Thursday. Ms. Harris will also hold a business round-table discussion with women, a signal of the administration’s concern over the gender policies of Mr. Yoon’s new conservative government. During his campaign, Mr. Yoon said he intended to shutter the Ministry of Gender Equality and Family.
But before Ms. Harris turned her attention to Korea, she sought to affirm the administration’s focus on Beijing.
Rahm Emanuel, the U.S. ambassador to Japan, said the administration’s investments in the semiconductor industry and military assistance to Ukraine had “enhanced the American brand, especially in comparison to China’s failed Covid, housing, technology crackdown and slowing economy.”