The country's economy grew more than expected in the second quarter, helped by strong household and business spending and recovering from a contraction earlier this year, but global trade tensions loom as major risks to the export and investment outlook.

While analysts expect the economy to sustain a recovery, some warn escalating global trade frictions could hurt exports, cool capital expenditure and weigh on growth.

Yusuke Ichikawa, senior economist at Mizuho Research Institute, said global trade conditions remain a risk for the rest of the year, even with support to growth from domestic drivers.