In the run-up to the election, various organizations conducted opinion polls to gauge voting intentions for the 48 proportional seats.
Polls are listed in chronological order, showing the oldest first.

Note: U/O - Undecided or other
Cabinet approval and disapproval ratings
In the run-up to the election, various organizations conducted opinion polls to gauge voting intentions for the 48 proportional seats. Polls are listed in chronological order, showing the oldest first.
Note: U/O - Undecided or other
Cabinet approval and disapproval ratings
2013 Japanese House of Councillors election