told (the party branch) he won't attend. The reason was not clearly explained," an LDP source said.

Supporters for Fukuda have urged him to publicly express his plan to run to draw media attention and build support in the party.

But Fukuda has remained silent, disappointing LDP lawmakers who want him to be the next prime minister. He has refused to attend a number of public meetings where he could have discussed his own policy ideas.

The July 28 meeting should have been the first discussion to be attended by all four at once. Policy debates had been expected to take place among the four, thus it had drawn the attention of political observers.