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Japan’s Ruling Coalition Set for Minority Rule After Upper House Loss

Exit polls show the coalition falling short of the 50 seats needed, intensifying doubts over Ishiba’s ability to secure a U.S. trade deal ahead of the August 1 tariff deadline.

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Voters fill in their ballots in the upper house election at a polling station Sunday, July 20, 2025, in Tokyo. (AP Photo/Eugene Hoshiko)
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Overview

  • Exit polls by NHK and other outlets project the LDP-Komeito alliance to win just 32 to 51 of the 125 seats contested, below the 50 needed for a majority in the 248-seat upper house.
  • The setback would leave Prime Minister Shigeru Ishiba’s government a minority in both chambers for the first time since the coalition’s formation in the 1950s, complicating its legislative agenda.
  • Voter frustration over rising inflation, a surge in staple food prices and a recent political funding scandal drove a shift toward smaller and populist parties, notably right-wing Sanseito.
  • Ishiba has vowed to remain in office despite intensifying calls for his resignation and faces the task of cobbling together ad-hoc alliances to pass key measures.
  • The loss adds uncertainty to critical negotiations with President Trump, with a 25 percent U.S. tariff set to kick in on August 1 if no trade agreement is reached.