Japanese Prime Minister Shinzo Abe's ruling coalition is on course for a resounding victory in Sunday's general election, according to exit polls.
One poll put Mr Abe's Liberal Democratic Party-led (LDP) coalition at 311 seats, allowing it to retain its two-thirds "super majority".
Other polls showed the coalition slightly below the two-thirds mark.
The majority is vital to Mr Abe's ambition to revise Japan's post-war, pacifist constitution.
Article 9 of the constitution, enacted by the country's American occupiers in 1947, calls for the complete renunciation of war.
Japan has worked around the rule by stating that its army exists for the purposes of defence, but Mr Abe has long made it clear that he wishes to revise it.