Japanese prime minister’s landslide win gives her party a lower-house supermajority and more room to enact a right-wing agenda

The governing party of Prime Minister Sanae Takaichi secured a two-thirds supermajority in a key parliamentary election Sunday, Japanese media reported citing preliminary results, earning a landslide victory thanks to her popularity.

Takaichi, in a televised interview with public television network NHK following her sweeping victory, said she is now ready to pursue policies that would make Japan strong and prosperous.

NHK, citing results of vote counts, said Takaichi’s Liberal Democratic Party, or LDP, alone secured 316 seats by early Monday, comfortably surpassing a 261-seat absolute majority in the 465-member lower house, the more powerful of Japan’s two-chamber parliament. That marks a record since the party’s foundation in 1955 and surpasses the previous record of 300 seats won in 1986 by late Prime Minister Yasuhiro Nakasone.

A smiling Takaichi placed a big red ribbon above each winner’s name on a signboard at the LDP’s headquarters, as accompanying party executives applauded.

Despite the lack of a majority in the other chamber, the upper house, the huge jump from the preelection share in the superior lower house would allow Takaichi to make progress on a right-wing agenda that aims to boost Japan’s economy and military capabilities as tensions grow with China and she tries to nurture ties with the Un...