News
The provisional results of the First Japan-South Korea-U.S. Joint Opinion Poll were released.
About the Japan-South Korea-U.S. Joint Opinion Poll
Beginning around June 2025, API, EAI, and KEI jointly refined the survey questions and developed a shared questionnaire based on mutually agreed core items. Each institution then implemented the survey in its own country, with methods adapted to local contexts. The questionnaire covered topics such as perceptions of each country, economic and social policy views, and attitudes toward security and geoeconomic issues. All three surveys were conducted online around the same period in August 2025—API through its own channels, EAI through Hankook Research, and KEI through YouGov. The study collected a robust dataset: 1,037 responses from Japan, 1,500 from the United States, and 1,585 from Korea, for a total of 4,122 responses.
Project Overview
This project is a collaborative international public perception survey conducted by the Asia Pacific Initiative (API) / the International House of Japan, together with the East Asia Institute (EAI, Korea) and the Korea Economic Institute of America (KEI, United States). The project aims to provide an analytical foundation for the increasingly important Japan–U.S.–Korea trilateral cooperation. By examining public perceptions, mutual views, and attitudes toward key issues across the three countries, it analyzes the current state of trilateral opinion, tracks trends in Japanese and Korean public sentiment, and offers policy implications. Japan-South Korea-U.S. Joint Opinion Poll, carried out in summer 2025, was API’s first-ever international public opinion survey. Following the survey, API and its partner institutions held a joint international press conference to announce the findings, published analytical reports, and organized roundtables with researchers from think tanks in each country. The project will continue to contribute to deeper regional cooperation going forward.
Co-Hosts
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Members
Ken Jimbo
Managing Director (Representative Director)
Ken Jimbo is a Professor at Keio University and Managing Director at IHJ. He is an expert in international politics, security studies, and Japan’s foreign and defense policy, with experience in various government-related positions.
Misato Nagakawa
Project Manager
Specializing in East Asian international relations, Misato Nagakawa has planned and implemented numerous educational activities focused on related themes of peace and reconciliation.
Ryusei Nosaka
Program Officer
Ryusei Nosaka is a Program Officer at IHJ, specializing in emerging technologies and security. He has worked at the International House of Japan, where he was involved in research on geoeconomics and the development of new initiatives.
Mitsuyoshi Yamashita
Deputy Executive Director
Mitsuyoshi Yamashita is Deputy Executive Director at IHJ, where he oversees and coordinates the organization’s programs. He has extensive experience in corporate support, human resource development, and study-abroad assistance.
Masashi Yui
Coordination Manager
Masashi Yui (PhD in Public Policy) is Coordination Manager at IHJ. He specializes in public administration and public policy and is engaged in research and analytical work on administrative reform and the international comparative evaluation of institutions.
Contact
For inquiries regarding this survey, please contact us here.
Reports
Japan-South Korea-U.S. Joint Opinion Poll (Preliminary Version)
This report summarizes the findings of the Asia-Pacific Initiative (API) at the International House of Japan regardingJapan-South Korea-U.S. Joint Opinion Poll conducted in August 2025 by three institutions: API, the East Asia Institute (EAI) in South Korea, and the Korea Economic Institute (KEI) in the United States.
Video
Division or Cooperation: Japanese Results of Japan-South Korea-U.S. Joint Opinion Poll
This YouTube video features footage of a joint press conference recorded by the East Asia Institute (EAI) regardingJapan-South Korea-U.S. Joint Opinion Poll conducted in August 2025 by three institutions: API, the East Asia Institute (EAI) in South Korea, and the Korea Economic Institute (KEI) in the United States. This video is in Korean. When watching, please select English subtitles from the YouTube subtitle settings.