NHK's latest poll shows 57 percent of respondents say they will definitely vote in Sunday's Upper House election, or have already cast an early ballot. That's down 7 points from a survey conducted before the Upper House election three years ago.
NHK surveyed more than 3,600 people by phone over three days, starting Saturday. More than 2,000 people responded.
Prime Minister Shinzo Abe's Cabinet received an approval rating of 45 percent, the same as a week earlier. The disapproval rating was also unchanged at 33 percent.
Sixty-seven percent said they were interested in the upcoming election, while 27 percent said they were not.
Forty-six percent said they will definitely go to the polls next Sunday, while 11 percent said they had already cast their ballot using the early voting system. Twenty-five percent said they intend to go, while 9 percent said they were undecided. Six percent said they will not vote.
Respondents were asked to choose the most important issue from a list of six.
Twenty-nine percent chose social security; 21 percent picked the economy; 19 percent said the consumption tax; 9 percent chose foreign and security policies, 8 said constitutional revision; and 3 percent picked nuclear power.
Twenty-six percent said they supported the government's plan to raise the consumption tax to 10 percent in October from the present 8 percent. Thirty-seven percent were opposed. Thirty-one percent said they couldn't say either way.
Twenty-nine percent said they thought the Constitution should be amended. Thirty-two percent said they didn't think so. Thirty percent said they couldn't say either way.