The two-day gathering of the Group of 20 finance chiefs ended Sunday with a commitment to mobilize all policy tools to keep the global economy on track amid increasing concerns about the ripple effects of a coronavirus outbreak that has largely idled China.

But the message does not seem to offer much reassurance, with the full scope of the economic impact from the virus remaining unclear. The epidemic shows no signs of abating in the world's second-largest economy and fears over a wider regional outbreak continue to grow.

Finance Minister Taro Aso was among the participants apparently frustrated with the looming uncertainties as the outbreak unfolds.