New Liberal Democratic Party President Junichiro Koizumi, set to become prime minister today, will see his resolve toward fiscal and economic structural reforms tested this weekend in Washington by the world's major economic powers.

The leadership change in Tokyo will not affect the policy task of the Group of Seven finance ministers and central bank governors when they meet Saturday in the U.S. capital to discuss the global economy.

Koizumi, who was elected LDP president Tuesday, is expected to succeed Yoshiro Mori today as prime minister.