Prime Minister Shinzo Abe's Liberal Democratic Party and its ruling coalition partner, Komeito, are expected to win more than a two-thirds majority in the Lower House on Sunday, the latest Kyodo News poll suggests.
The LDP alone could even win more than 300 of the 475 seats and secure the two-thirds majority required to propose a revision to the pacifist Constitution.
The figure is far higher than Abe's minimal goal of securing an overall majority of 238 seats with Komeito, and exceeds the 295 seats that the LDP held before Abe dissolved the Lower House last month.