The government on Tuesday maintained its overall assessment of the economy for the fifth consecutive month but added a warning about "weak movements" in corporate capital investment amid falling revenue.

"Although the economy has been picking up, it is short of autonomous factors and remains in a difficult situation, such as a high unemployment rate," the Cabinet Office said in its economic report for December.

The monthly report also said that "weak movements" have been seen recently, downgrading its assessment of the economic component for the first time in six months.