Guitarist Eric Clapton, cellist Yo-Yo Ma and soprano Sara Brightman will be involved in the musical program of the 2005 Aichi World Exposition that begins next March, organizers said Thursday.

Clapton, who has joined the expo as an executive music consultant, has contributed a new song, "Say What You Will," which is the theme song for the Love the Earth musical program, they said.

Hiroshi Yanai, the expo's executive event producer, said the unplugged, acoustic concept of the musical program matches the main theme of the expo, "Nature's Wisdom."

Yanai said that around 10 concerts will be held as part of the program during the 185-day expo period, and a compilation CD of participating artists will be released before the March 25, 2005, opening of the expo.

Ma and Brightman will perform live at the expo, but it is uncertain whether Clapton will come to Japan to participate, he said.

The Aichi expo events are designed around addressing environmental issues. A total of 125 countries have said they will participate. The organizers expect some 15 million visitors.