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2023 Fiscal Year Final Research Report

Sending Troops Overseas: How Party Politics matters in Japan and Germany

Research Project

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Project/Area Number 19K23169
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0106:Political science and related fields
Research InstitutionKanagawa University (2022-2023)
The University of Tokyo (2019-2021)

Principal Investigator

Takashima Asako  神奈川大学, 人間科学部, 非常勤講師 (00850603)

Project Period (FY) 2019-08-30 – 2024-03-31
Keywords国際政治 / 外交政策 / 日本 / ドイツ / 海外派兵
Outline of Final Research Achievements

This study adds a new analysis of the government's policy regarding overseas deployment from the perspective of party politics, and clarifies what determines the increase or decrease in overseas deployment. While political parties have ideologies, they also experience changes in preference formation as a result of being the party in power.
In the quantitative analysis, which was conducted as a multinational comparative analysis, and in the qualitative analysis, which was conducted for Japan and Germany, it was found that preferences change when a party becomes the ruling party. In particular, the change in policy preferences of the German Green Party in 1998 and the Democratic Party of Japan (DPJ) since 2005 is clear, indicating that party ideology changes not only along existing axes such as left-right and GAL-TAN, but also after becoming the ruling party.

Free Research Field

国際関係論

Academic Significance and Societal Importance of the Research Achievements

本研究は海外派兵を巡る政府の政策について、政党政治の観点から新たな分析を加え、海外派兵の増減が何によって規定されるのかを明らかにした。政党はイデオロギーを有する一方、政権与党であることによる選好形成の変化を経験するものであり、与党と野党で大きく選好形成過程が変化することが明らかになった。こうした発見は、政党のイデオロギーが左右軸やGAL-TANといった既存の軸以外でも導出できることを示唆している。またこのことは、社会的にも、政権交代の新しい意義を見出すものであると考えられる。政権与党のイデオロギーが変化しても、政策の継続性が見られることで、国内でのコンセンサス形成に資すると考えられる。

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Published: 2025-01-30  

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