Prime Minister Junichiro Koizumi promised his Group of Eight partners Wednesday that he will carry out decisive structural reforms to contribute to global economic growth.

Koizumi made the pledge as the G8 leaders expressed confidence in the outlook for the global economy as well as for the Japanese economy, which has the worst performance among the world's richest countries.

Koizumi told his G8 partners that Japan in May declared the economy had bottomed out and said his country will promote reforms in order to help guide the world economy back onto a growth track.

The G8 leaders kicked off their two-day annual summit Wednesday at the Canadian Rockies resort of Kanansakis, Alberta.