Finance Minister Kiichi Miyazawa said Wednesday that the 500 billion yen reserve budget should be used to shore up the economy soon after the June 25 general election, bolstering the ruling coalition's joint campaign pledge.

Miyazawa said during a news conference that the reserve budget would be allocated separately to the possible September decision to prepare a supplementary budget.

The ministry's budget bureau has recently begun studying ways to use the reserve fund for public works projects, he said.