In recent addresses, Biden has asserted that "American alliances are our greatest asset" and pledged to maintain the so-called "quad" of the United States, India, Australia and Japan to counter Chinese hegemony in the Asia-Pacific region.
Japan's response to the new "leader of the free world," though, has been comparatively understated. This may come as something of a surprise given the vitriolic pursuit of outgoing president, Donald Trump, by the mainstream media and academia in the English-speaking world.
Trump was not universally admired in Japan either -- his support among the mass of Japanese voters was on a low par with former U.S. Presidents Dwight D Eisenhower, the two Bushes and Jimmy Carter. But he was notably more popular among Japan's revisionist political elite, the right-leaning media and some conservative groups within society.
One reason for this is that he was viewed by many as a "no nonsense" president. In contrast, previous U.S. leaders such as Barack Obama were widely venerated among the Japanese population, but he and other Democrat presidents have often championed foreign policies that were unpopular with Japan's political elite.
For example, Bill Clinton was regularly accused of "Japan-passing" -- in favor of a focus on improved U.S.-China relations. Meanwhile Obama's "pivot to Asia" ruffled feathers by seemingly allowing China's ascendancy to regional hegemony.
When it comes to acting as a buffer against the supposed threats of China and North Korea, nowhere matters more than the southwestern island chain of Okinawa. Okinawa's main island hosts almost 75% of U.S. forces in Japan, as well as several new Japan Self Defense Force facilities.
Trump upset Okinawans by demanding even more host nation support for military bases on the islands. He also strained relations with former prime minister, Shinzo Abe, when he agreed to summits with the PM's longstanding adversary, Kim Jong Un. Yet his relationship with Abe was closer than most. Abe's aides even boasted that the Japanese premier was the only world leader who could communicate effectively with Trump.
Moreover, Trump's demands that Japan contribute more toward sharing the security burden in the Asia Pacific in one sense aligned with much of Japan's right-of-center policymaking elite. This is because the Trump administration was in effect pushing Japan toward assuming the status of a "normal" state in political and military terms. This has long been the goal of leading conservative political figures from Japan's ruling LDP party.
Japan is restricted by its anti-militarist constitution, which prohibits the use of armed forces to resolve international conflict. Many of those relatively receptive to Trump's demands are also in favor of revising the constitution to remove these constraints, not to mention being firmly in favor of his hard line against China.
Conversely, Biden is associated with Obama's pivot to Asia and more inclusive relations with Beijing. So there is suspicion over his intentions in the region. So far, the new president's administration has touted an approach of continued strategic rivalry with China. This includes using Japan as a buffer against Chinese expansion. But the extent to which Japan's newly elected successor to Abe, Yoshihide Suga, formerly the chief Cabinet secretary and close ally of the former prime minister, can trust America's acclaimed savior is less clear.
This has been compounded by a perception of possible irregularities. However dubiously, Biden has been accused of personal and electoral wrongdoing. Interestingly, such allegations have gained more traction in the Japanese media than in many other countries. For example, many leading media sources in the United States and United Kingdom dismissed Trump's accusations of election fraud as baseless. In Japan, meanwhile, more than one source has presented these claims as at the very least debatable.
Such debate includes questioning how votes were cast and counted in key battleground states. For instance, use of Dominion software for ballot-counting has been pointed to within Japan as grounds for potential suspicion. And although not covered by many Western media channels, the blackout of Trump's complaints over the non-coverage of allegations of corruption against Biden's son, Hunter, connected to business dealings in China, has also raised eyebrows.
Finally, the perceived hypocrisy of big tech companies that promote free speech censoring the former president's online presence has been discussed across Japanese media channels. Even Japan's traditionally Democrat-leaning mainstream news outlets have voiced concerns over this as amounting to censorship of free speech.
For all these concerns, Biden's arrival on the scene has raised hopes of a more stable U.S. foreign policy in the Asia Pacific. Nevertheless, questions remain in Japan. Is Biden going to provide the kind of regional stability befitting of "the American pacifier"? Is his administration any more trustworthy than Trump's was?
Either way, the president's mental lucidity, physical stamina and ability to lead the free world will remain under close scrutiny. His greatest challenge will be consolidating a U.S.-Japan security alliance that can credibly balance against China in the 2020s and beyond.