The economy grew an annualized 0.2 percent in the July-September quarter, not the 0.3 percent stated in the preliminary report last month, the government said Wednesday after tweaking the nation's gross domestic product under a new calculation method.

The revised GDP -- which measures the total value of all goods and services produced in the country -- amounts to a real growth of just 0.1 percent on a quarterly basis, the Cabinet Office said, underlining the weakness in the world's second-largest economy.

The new calculation method also forced a reversal in the April-June GDP, changing it from the initially reported 1.1 percent growth to an annualized 0.6 percent contraction -- the first GDP shrinkage in five quarters.