TOKYO — Japan’s governing party and its coalition partner scored a major victory in a parliamentary election Sunday, possibly propelled by sympathy votes in the wake of the assassination of former Prime Minister Shinzo Abe.

Early results in the race for the parliament’s upper house showed Abe’s governing party and its junior coalition partner Komeito securing a majority in the chamber and adding more.

The last day of campaigning on Saturday, a day after Abe was gunned down while delivering a speech, was held under heightened security as party leaders pledged to uphold democracy and renounce violence.

Preliminary vote counts showed the governing Liberal Democratic Party on track to secure a coalition total of at least 143 seats in the 248-member upper house, the less powerful of the two chambers.

Up for election was half of the upper house’s new six-year term. With a likely major boost, Prime Minister Fumio Kishida stands to rule without interruption until a scheduled election in 2025. — Agencies