Japan's government maintained its economic assessment for a fourth straight month in August but offered a slightly bleaker view on the outlook than in July, as a resurgence in COVID-19 infections weighed on consumer spending.

"The economy continues to pick up but showing some weaknesses as conditions remain severe due to the coronavirus pandemic," the government said in its monthly economic report released on Thursday.

On the outlook, the August report warned of the need to pay attention to "heightening downside risk caused by the pandemic."

That compared with the previous month's view that said the government needed to be vigilant to the "impact" of the pandemic.

The government kept its assessment unchanged for most parts of the economy, including consumer spending, which it described as weak mainly due to the services sector.

Reflecting sluggish household demand for goods including those shipped from overseas, the government cut its assessment on imports for the first time in 10 months.

But it revised up its view on corporate profits for the first time in six months due to solid second-quarter earnings among manufacturers.

The report underscored the divergence between the continued strength in exports driven by robust global demand, and the weakness in consumer spending blamed on the state of emergency curbs to combat the pandemic.

The world's third-largest economy grew more than expected in the second quarter after a slump in the first three months of this year thanks to solid exports.

But the fast-spreading delta variant has forced the government to extend the state of emergency curbs and expand targeted areas, crippling already weak consumption.