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Japan's LDP Leadership Race Narrows to Koizumi and Takaichi, Shaping Future Foreign Policy

Published on: 30 September 2025

Japan's LDP Leadership Race Narrows to Koizumi and Takaichi, Shaping Future Foreign Policy

Japan's Next Prime Minister: Takaichi or Koizumi and the Future of Foreign Policy

The race to determine the next leader of Japan's Liberal Democratic Party (LDP), and likely the next Prime Minister of Japan, is underway. While the outcome remains uncertain until October 4th, Ms. Sanae Takaichi and Mr. Shinjiro Koizumi are considered frontrunners, offering potentially different pathways for Japan in a challenging geopolitical landscape.

The LDP Leadership Race and Potential Policy Shifts

The ongoing LDP leadership race has largely focused on the possibility of Japan getting its first female prime minister or its youngest. Beyond these historical considerations, significant domestic challenges await the eventual winner. While the five candidates share broadly similar views on defense and diplomacy, nuanced differences in their approaches could lead to distinct policies.

Hawkish Stances and Constraints on Maneuverability

While candidates exhibit similar views on issues like bolstering Japan's defenses and maintaining the alliance with the United States, differences emerge in their approaches to these critical areas. The next prime minister, whether more hawkish like Sanae Takaichi or not, will face both domestic and external constraints that will limit Tokyo's room for manoeuvre on the global stage.

Key Areas of Focus: Defense and Diplomacy

The candidates' views on defense and diplomacy are paramount in the leadership race. The need to continue strengthening Japan's defense capabilities is a common theme. The importance of the alliance with the United States and relationships with neighboring countries are also consistently emphasized, albeit with subtle variations in approach.

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