Support for Prime Minister Shinzo Abe's Cabinet fell to 53.9 percent in a nationwide telephone survey conducted Saturday and Sunday, down 1.8 points from the previous poll in September.
The Cabinet's disapproval rating meanwhile rose 3.2 points to 33.2 percent.
On Abe's efforts to get the U.S.-led Trans-Pacific Partnership pact ratified by the Diet, 66.5 percent of the respondents said the legislature should proceed carefully on the trade pact without regard to resolving the matter before the Diet session closes on Nov. 30.
The 66.5 percent figure on TPP is 6.7 points lower than in the September poll, which was also conducted by Kyodo News, but respondents who back ratifying the pact during the current Diet session stayed at 17.7 percent.
In the meantime, 57.4 percent of respondents were opposed to assigning new kinds of missions to the Self-Defense Forces under the divisive security legislation that took effect in March. The groundbreaking duties under consideration include rescuing U.N. personnel who come under attack by armed groups during U.N. peacekeeping operations.
Asked whether Tokyo's venue plans for the 2020 Olympics should be reviewed, 72 percent said yes and 19.8 percent said no.
Tokyo Gov. Yuriko Koike is considering proposals to move venues for several of the sporting events reduce costs.