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Law and Economics in Japan’s Courts: Emerging Trends and Developments

  • Hiroharu Saito EMAIL logo
Veröffentlicht/Copyright: 6. Februar 2025
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Abstract

This article briefly reviews the emerging trends of incorporating law and economics perspectives within the Japanese judiciary. In the first part, I review opinions of Justice Koichi Kusano, the first justice in the history of the Supreme Court to adopt law and economics approaches. In particular, I discuss his two key approaches: the maximization of well-being and the use of quantitative empirical analysis. In the second part, I explore the broader judiciary context, including transformations in the Supreme Court’s majority opinions and the practices of lower courts and lawyers. Specifically, I highlight the Supreme Court’s growing emphasis on empirical data, particularly concerning social circumstances and public attitudes. Additionally, I analyze the subsequent shift in lawyers’ practices, which increasingly include the submission of survey data and statistical evidence. I also present emerging trends in the annual number of court decisions that reference regression analysis.


Corresponding author: Hiroharu Saito, Associate Professor of Law and Society, The Institute of Social Science, The University of Tokyo, Tokyo, Japan, E-mail:

Acknowledgments

I would like to thank all the participants at the conference, “The Past, Present, and Future of Law & Economics in Asia” held at Cornell Law School for their helpful feedback, with special thanks to the organizer, Yun-chien Chang, and the session moderator, Dawn Chutkow.

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Published Online: 2025-02-06

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