Japanese Prime Minister Shigeru Ishiba said Monday he will stay in office to tackle challenges such as rising prices and high U.S. tariffs after a weekend election defeat left his coalition with a minority in both parliamentary chambers and triggered calls for his resignation.

Japanese Premier Shigeru Ishiba vowed to remain in his post on Monday after his ruling coalition suffered a bruising defeat in upper house elections, prompting some in his own party to doubt his leadership as the opposition weighed a no-confidence motion.

Japanese Prime Minister Shigeru Ishiba sought to buy time for his premiership following a second election setback in less than a year that leaves him in a weaker position to stave off opposition tax cut demands or secure a last-minute trade deal with the US.