The government stepped up the battle against its own currency Tuesday, announcing it will keep a dollar loan program in place to encourage corporate overseas investment and optimal use of the yen's strength.

The six-month extension of the ¥10 trillion ($127.8 billion) loan facility, which was scheduled to expire later this month, comes as the stronger yen continues to eat into exporters' earnings and sap the economy.

With the government unable to conduct effective market intervention on its own, it has resorted instead to verbal warnings.