The support rate for Prime Minister Yukio Hatoyama's Cabinet stood at 47.2 percent in a recent survey, down 16.5 percentage points from the previous poll conducted a month ago.
The disapproval rate rose 13.0 points to 38.1 percent in the survey, which was carried out Friday and Saturday after prosecutors indicted two of Hatoyama's former secretaries over falsified fund reports.
In the telephone survey, a total of 1,470 eligible voters were contacted, of whom 1,030 made valid responses.