Japan's economy contracted an annualized 1.4 percent in the final quarter of last year as consumer spending slumped, adding to headaches for policymakers already wary of damage the financial market rout could inflict on a fragile recovery.

The data underscores the challenges premier Shinzo Abe faces in dragging the economy out of stagnation, as exports to emerging markets fail to gain enough momentum to make up for soft domestic demand.