Asian triangles may not prove eternal

With the very welcome announcement by US President Barack Obama's National Security Adviser Susan Rice of separate state-visit invitations to the leaders of China and Japan, the much-discussed but so far amorphous US "pivot to Asia" policy looks to be taking on the shape of a triangle.

But triangles, a common plot device of romantic novelists, can make for stormy and unstable relationships. Japan and China both now have strong leaders. The US' conduct in Asia has not always been consistent and is sometimes indifferent. Each might wish for the US to choose between them, but with a long-abiding security treaty with Japan and economic ties to China that are historically unprecedented, they both figure America will try to play both sides of the street.

And despite the tension and everything that come with it, Chinese President Xi Jinping and Japanese Prime Minister Shinzo Abe will accept a shared relationship with Washington as preferable to any other geometry of tension and uncertainty. Two of the three triangle points are nuclear powers, and a rapid deterioration in East Asian security could produce a third all too quickly. In this regard, the triangle does appear to be a better arrangement than any other conceivable configuration.