By Satoshi Sugiyama and Leika Kihara TOKYO (Reuters) -Japanese Prime Minister Shigeru Ishiba is planning to soon decide whether to step down after assessing progress in tariff negotiations with the United States,

Japan's embattled prime minister Shigeru Ishiba, fresh off a crushing defeat in upper house elections over the weekend, will not be in a position of strength to negotiate a favorable trade deal with the U.S., analysts said.

Anti-establishment parties focused on wages, immigration and an unresponsive political elite struck a chord with working-age people in Japan.

Japan's prime minister is clinging to power today, but his outlook remains uncertain. This follows a weekend election that delivered several surprises. HPR's Bill Dorman has more in today's Asia Minute.

Sanseito, a Japanese populist party that draws inspiration from Donald Trump's politics, is gaining support ahead of Sunday's upper house elections, suggesting a notable shift in the country's traditionally centrist landscape.

A fringe far-right populist party Sanseito was one of the biggest winners in the weekend's upper house election, attracting many voters with “Japanese First" platform that included calling for tougher restrictions on foreigners and the curtailment of gender equality and diversity policies.

Japan’s voters dealt Prime Minister Ishiba Shigeru of the Liberal Democratic Party (LDP) with yet another devastating blow on Sunday, the second electoral loss since coming into office last fall.

The fringe far-right Sanseito party emerged as one of the biggest winners in Japan's upper house election, gaining support with warnings of a "silent invasion" of immigrants.

Japanese Prime Minister Shigeru Ishiba has vowed to remain in office, despite exit polls indicating that his Liberal Democratic Party's ruling coalition has lost its majority in the country's upper house.

TOKYO — 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.

The road to Japan’s trade deal with the U.S. just got longer and more winding as Prime Minister Shigeru Ishiba’s coalition lost its majority in the upper house following the election held on Sunday. It was only in late October that Ishiba’s Liberal Democratic Party lost the majority in the lower house it had held since 2012.