CHINA and Japan, Asia's two most powerful nations, are increasingly jousting in the skies and in the seas near a set of disputed islands. Although their economies remain deeply intertwined, relations between the two governments seem locked in an irreversible, dangerous downward spiral.
Japanese Prime Minister Shinzo Abe further embittered feelings last week by visiting the controversial Yasukuni Shrine, which honours the souls of Japan's war dead, including 14 World War II leaders convicted as Class A war criminals.
Needless to say, neither side seems terribly interested in a rapprochement. That's a shame, because the deterioration in ties is fairly recent, stemming from a single incident involving the islands administered by Japan, which calls them the Senkakus, and claimed by China, which refers to them as the Diaoyu. A single, symbolic-but-generous gesture could well halt the slide.
Mr Abe, though unquestionably a hawk on China, had nothing to do with the triggering event. In September last year, then Prime Minister Yoshihiko Noda ordered his government to buy several of the disputed islands from a private owner - an action which, in China's view, effectively nationalised them.
Mr Noda hadn't intended to provoke the Chinese. On the contrary, he aimed to pre-empt a more aggressive gesture by hyper-nationalist politician and then Tokyo Governor Shintaro Ishihara, who wanted to have the Tokyo metropolitan government purchase the islands and build on them to assert Japan's sovereignty.
Still, barely two days before Mr Noda's decision, China's then President Hu Jintao had specifically warned him not to proceed. Mr Hu's concerns were legitimate. For years, China had quietly accepted Japan's "de facto" occupation of the islands even as it disputed sovereignty. By buying them, Japan appeared to be moving to "de jure" ownership. Given the nationalist mood in China, Beijing couldn't risk appearing weak in its response.
If Mr Abe really wanted to break the chain of escalation that has since played out between China and Japan, he could singlehandedly return to the status quo ante. He would only need to "sell" the islands to a private Japanese foundation or environmental group, ostensibly to preserve their undeveloped natural beauty.
Japanese hardliners would no doubt regard such a move as a capitulation to China. It wouldn't be. Even after a sale, Japan would continue its de facto occupation of the islands, as it has for decades. Since the islands' purchase was made by a previous government, Mr Abe's Liberal Democrats need not feel bound by the decision. In fact, after pacifying his nationalist supporters by visiting Yasukuni, Mr Abe may be in a stronger position to compromise on the islands.
In an interview with Bloomberg earlier this month, Mr Abe called for a summit with Chinese President Xi Jinping and said, "Now is the time to go back to that starting point." Mr Abe was referring to a bilateral agreement he had reached with Mr Hu in 2006, during a previous term as Japan's prime minister. Selling the islands would be a critical first step towards returning to that calmer time.
If Mr Abe wanted to be bolder, he could make the same offer to China that Japan has made to South Korea over a different set of disputed islands: to have the issue resolved by the International Court of Justice. The chances of China agreeing to this are minuscule. But by taking the moral high ground, Japan would both reaffirm its reasonableness, and satisfy the major precondition China has imposed on any Xi-Abe summit - acknowledging that sovereignty of the Senkakus/ Diaoyu is in dispute.
Of course, if it's hard to imagine an Abe administration reaching out to Beijing now, it's equally hard to see Chinese leaders responding constructively. Yet on a simple cost-benefit analysis, Mr Xi has incentive enough to scale back aggressive naval and air patrols of the waters surrounding the islands. He has just embarked on a set of difficult, potentially far-reaching economic reforms. Although he can't afford to look weak domestically, he also can't afford a geopolitical crisis that would disrupt China's economy and possibly global trade.
A major rebalancing is gradually taking place in Asia as China's economy becomes larger than Japan's. But it isn't in China's interest to push for this rebalancing too aggressively.
When I was in Tokyo early this month, I was struck by the intensity of concern over China's aggressive posturing. The harder the Beijing government pushes now, the more rapidly Japan will move to upgrade its military capabilities and strengthen its alliances with the US and countries ringing China.
Both sides need to find a way to ratchet down their words and deeds. Japan can and should take a first, small step forward by "going back" and selling the islands. Any Japanese leaders who doubt the wisdom of doing so should ask themselves a question: Are they really better off today than they were two years ago?
The writer is dean of the Lee Kuan Yew School of Public Policy at the National University of Singapore, and author of The Great Convergence: Asia, The West And The Logic Of One World.