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Top Questions

Why did Prime Minister Shigeru Ishiba resign?

What challenges will the next Liberal-Democratic Party leader face?

Who won the 2025 Liberal-Democratic Party presidential election?

What has contributed to the precarious state of Japanese politics in the 2020s?

Sanae Takaichi, a hardline conservative and former economic security minister, emerged victorious in the Liberal-Democratic Party’s (LDP) leadership contest on October 4, 2025. She was sworn in as Japan’s first woman prime minister on October 21. The election had been scheduled after Prime Minister Shigeru Ishiba announced on September 7 his intention to resign from both the premiership and the LDP presidency. Ishiba made the decision in the wake of the LDP’s historic defeats in the October 2024 and July 2025 elections, in which it lost its parliamentary majority in both houses of the Diet for the first time since its founding in 1955.

Takaichi, a protégé of former prime minister Shinzo Abe, defeated agriculture minister Shinjirō Koizumi in a runoff with 54.3 percent of the vote after none of the five candidates secured a majority in the first round. She is known for an expansionary fiscal agenda inspired by Abe’s economic policies, calling for aggressive government spending, tax incentives, and increased efforts to tackle rising prices. She has also been described as an “anti-globalist” who emphasizes protecting national interests at a moment of economic strain, demographic decline, and growing unease over immigration.

The Liberal-Democratic Party’s Dominance in Japan

Since its founding in 1955, Japan’s center-right Liberal-Democratic Party (LDP) has dominated national politics, holding power almost continuously for seven decades, with only brief interruptions in the early 1990s and from 2009–12. Japan is unusual among democracies for the degree of one-party hegemony it has experienced. The LDP is not politically monolithic, however: It is divided into internal factions, spanning a spectrum from centrist to far right. As a result, major elections in Japan have often determined not whether the LDP would govern, but rather which factional leader within it would become party president and prime minister.

Background

In the 2020s the LDP has seen four prime ministers resign in quick succession amid scandal, violence, the COVID-19 pandemic, and political upheaval, reflecting the precarious state of Japanese politics. Shinzo Abe, the country’s longest-serving leader, resigned in 2020 citing health reasons but was assassinated in 2022 in an event that exposed ties between the LDP and the Unification Church (a controversial religious movement founded in South Korea). His successor, Yoshihide Suga, left office after a little more than a year amid criticism of his pandemic response. Fumio Kishida then became prime minister but resigned in 2024 after approval ratings collapsed following a campaign-funds scandal. Shigeru Ishiba, a longtime rival of Abe, succeeded Kishida but failed to restore public trust, leading to his resignation announcement.

What is at stake?

The next leader of the LDP will face pressing challenges, including:

Quick Facts
Date:
October 4, 2025
Location:
Japan
  • Political instability: After four collapsed premierships in the 2020s, restoring stability within both the LDP and the Japanese government will be imperative.
  • Economic pressures: Stubborn inflation, a weakened yen, and rising living costs have fueled widespread public frustration.
  • Demographic decline: Japan’s population is shrinking and aging, with consistently low birth rates compounding the crisis.
  • Regional and global instability: The United States, a long-standing ally, recently imposed tariffs on Japanese goods. Meanwhile, relations with China, North Korea, and Russia remain tense in an increasingly volatile international environment.

The candidates

Sanae Takaichi, a hardline conservative, won the plurality of the vote in the first round of voting on October 4. She then defeated moderate Shinjirō Koizumi in a runoff.

Candidates in the 2025 LDP presidential election
candidate top posts held significance votes in first round votes in the second round
Shinjirō Koizumi minister of agriculture, forestry and fisheries under Prime Minister Shigeru Ishiba The son of former Prime Minister Junichiro Koizumi, he would be Japan’s youngest prime minister if elected. A moderate reformist, he is positioning himself as the face of generational change within the LDP and appeals to younger voters. 164 (27.8%) 156 (45.8%)
minister of the environment under Prime Minister Shinzo Abe
Sanae Takaichi minister for internal affairs and communications under Prime Minister Abe A veteran conservative backed by nationalist and traditionalist factions, she would be Japan’s first woman prime minister if elected. She is known for her hawkish defense views and emphasis on fiscal stimulus. 183 (31%) 185 (54.3%)
minister of state for economic security under Prime Minister Fumio Kishida
Yoshimasa Hayashi chief cabinet secretary under Prime Minister Ishiba A pragmatic centrist with extensive cabinet experience, Hayashi is presenting himself as a stable, moderate choice amid political turbulence, with a reputation for competence in both foreign and domestic policy. 134 (22.8%)
minister for foreign affairs under Prime Minister Kishida
minister of education, culture, sports, science and technology under Prime Minister Abe
Toshimitsu Motegi LDP secretary-general under Prime Minister Kishida A seasoned policymaker with experience in diplomacy and economic affairs, he is respected for his steady management skills but lacks the concerted support base of figures such as Koizumi and Takaichi. 49 (8.3%)
minister for foreign affairs under Prime Minister Abe
minister of economy, trade and industry under Prime Minister Abe
Takayuki Kobayashi minister for economic security under Prime Minister Kishida A younger conservative associated with Japan’s focus on economic security and technology resilience, he is viewed as a representative of the next generation of the party’s right wing, though with a more limited national profile than the other contenders. 59 (10%)
Ethan Teekah