Japanese Prime Minister Shigeru Ishiba has won a run-off vote in parliament to stay in his post, after an election setback last month that saw his coalition lose its majority in the lower house.

Ishiba, 67, took over as prime minister from Fumio Kishida, who stepped down in September amid a series of scandals that rattled public trust in the Liberal Democratic Party (LDP) party.

In an extraordinary parliament session today, Ishiba defeated Yoshihiko Noda, the leader of the main opposition party Constitutional Democratic Party of Japan.

Ishiba will now have to navigate hostilities within his party, economic woes and a period of flux in international relations.