A European Union delegation will visit Japan on either July 6 or 9 in an effort to save the 1997 Kyoto Protocol on global warming, EU diplomatic sources said Wednesday.

The schedule is tentative, but those two days are the only ones on which the EU mission can visit Japan and Australia, who are traditionally allies of the United States on climate change, the sources said.

EU Environment Commissioner Margot Wallstrom and representatives from Sweden and Belgium will be included in the delegation.

The representatives will be decided Thursday, the sources said.