TOKYO (BLOOMBERG) - Japanese Prime Minister Shinzo Abe has so far managed to keep the coronavirus outbreak from damaging his hard-won relationship with China. That's getting more difficult with each new case confirmed in Japan.

Mr Abe has taken a softer approach to China over the virus than the Trump administration, winning Tokyo praise in Beijing. That chimes with his efforts to nurse Japan's relationship with its giant neighbour and biggest trading partner back to health since he took office in 2012 amid the worst crisis in decades.

Unlike others including the United States, Australia and Singapore, Mr Abe's government has avoided a blanket ban on visitors from its neighbour, instead restricting entry from just two provinces. While acting quickly to evacuate its citizens from the virus epicentre of Hubei, Japan also used the planes to fly in aid packages for China.

That's contrasted with Japan's counterparts in the US, who have questioned China's commitment to transparency during the crisis - leading to bickering between the two sides. China is also keen to keep ties strong with Mr Abe amid a painful trade war with the US that has battered its economy.

"Japan's attitude has been very helpful for China," said Professor Noriyuki Kawamura from Nagoya University of Foreign Studies. "China's initial response to the virus was insufficient. The question is what Japan will do when those problems are exposed. Will it criticise China or close its eyes?"

China has shown its appreciation for Japan's approach, marking an unusual interlude in a relationship between Asia's two biggest economies long rocked by disagreements over history and territory.

Personal touches like a fragment of ancient Chinese poetry attached to aid packages from a Japanese group and a video of a Tokyo-based ballet troupe singing the Chinese national anthem won widespread praise on Chinese social media.

But as coronavirus infections rise in Japan, Mr Abe is likely to find his position harder to maintain, especially given that an earlier alert from China could have slowed the spread of the disease.

Before global warning flags were raised, thousands of Chinese tourists visited all parts of Japan and have since been linked to cases of virus transmission. Three people have so far died of the infection in Japan.

'CHERRY TREES BLOOM'

Chinese visitors to Japan in January rose 22.6 per cent from a year ago, data released Wednesday (Feb 19) showed. Even though infection numbers in China grew dramatically in late January, Mr Abe's government only banned entry to those from Hubei province on Feb 1.

While the virus outbreak initially provided an opportunity for Japan to show solidarity, it's likely to interfere with Mr Abe's plans for a state visit by President Xi Jinping, meant to crown the seven-year slog to restore relations.

Japanese officials have repeatedly said there's no change to the plan to treat Mr Xi with full state honours "when the cherry trees bloom" in early April, but both sides may find the trip harder to manage.

The virus also appears to be eating away Mr Abe's long-solid voter support. A poll published this week by the conservative Yomiuri newspaper, which generally backs Mr Abe, showed 52 per cent of respondents were dissatisfied with the way the government has been handling the outbreak. His support rate dropped in all three media surveys published on Monday.

The opposition Democratic Party for the People has called for a ban on all foreigners visiting from China. Former premier Yukio Hatoyama's Twitter announcement that an organisation he heads had donated a million masks to China was met with a barrage of online criticism amid a serious shortage of such items in Japan.

CLAMPDOWN COMING?

Some in Mr Abe's own ruling Liberal Democratic Party oppose Mr Xi's state visit, partly because of the ongoing incursions by Chinese ships into what Japan sees as its territorial waters around disputed East China Sea islands.

An annual poll by think tank Genron NPO published in October found 46 per cent of Chinese had a favourable impression of Japan, the highest since the survey began in 2005, as more tourists experience the country for themselves. Nearly 10 million Chinese visited Japan last year.

Almost 85 per cent of Japanese respondents to the same poll said they had an unfavourable impression of China. By contrast, Chinese Ministry of Foreign Affairs spokesman Hua Chunying said gratitude would bring the two peoples together.

"Since the outbreak of the epidemic, the Japanese government and people have expressed sympathy, understanding and support to us," she told reporters on Feb 4. "What the virus has done is cruel and will not last. What the people have done is touching and will be remembered forever."

She later tweeted in Japanese about China sending testing kits to its neighbour, saying: "There are no borders in the fight against the virus."

Sceptics point out that there are still deep divisions between the neighbours, including over Japanese citizens detained in China and restrictions on Muslims in the western region of Xinjiang. The territorial dispute over East China Sea islands that brought them close to a military clash in 2012-13 is no nearer to resolution.

"Neither side has reduced its number of patrols close to the islands," said Associate Professor Tsai Hsi-hsun, director of Tamkang University's Graduate Institute of Japanese Political and Economic Studies in Taiwan. "They still don't trust each other in terms of national security and that distrust is deeply ingrained on both sides even though, on the surface, the relationship looks better."