Kohyama Hiroyuki

コウヤマヒロユキ | Kohyama Hiroyuki

Affiliation and department：
Job title： Professor

Research field (1)： Public law

Research theme for competitive and other funds (8)：

2023 - 2027 The Roles of Businesses and Laws in the Age of "Sustainable Society"
2022 - 2026 Public Finance for Global Issues
2018 - 2022 国家財政と世代間衡平~行動洞察と租税法・財政法の法システム再構築~(研究代表者)
2018 - 2021 Country-by-country comparison study about compact city policy and local government management in super-old society
2014 - 2019 Fiscal Policy in a Crisis: Intergenerational Risk Sharing through Tax System

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Papers (69)：

Hiroyuki KOHYAMA. Tax Law and Evidence Based Policy Making. A festschrift for Katsuya Uga on his 70th birthday. 2025. 993-1010
Hiroyuki Kohyama. International Humanitarian Tax and International Solidarity Tax: Spatial Expantions of Tax law for Global Problems. Journal of Japan Tax Research Institute. 2025. 86. 205-235
Hiroyuki KOHYAMA. Tax Law, Economics and Neuroscience. Market, Nation and Law: A festschrift for Minoru Nakazato on his 70th birthday. 2024. 65-85
Hiroyuki KOHYAMA. Issues of Progressive Value Added Tax: Timing of Taxation. 2024. 231-248
Hiroyuki KOHYAMA. Fiscal Risks and COVID-19. Jurist. 2023. 1591. 46-51

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MISC (39)：

Hiroyuki Kohyama. Current Issues on Property Tax. Asset Valuation Information. 2026. 270号別冊. 8-45
Hiroyuki Kohyama. Tax Equality and Neutrality. 2025. 17-31
神山弘行. <書評>「中里実著『租税法論集I~IV』」. ジュリスト. 2025. 1613. 113
Hiroyuki KOHYAMA. Study on Case Law: Purpose of CFC rules. Jurist. 2024. 1601. 118-121
Hiroyuki KOHAYMA. “Trust and Taxation in the era of 100 year lifespan". Trust. 2024. 298. 6-17

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Books (4)：

Market, Nation and Law : A festschrift for Minoru Nakazato on his 70th birthday
2024
Treatise on Japanese Taxation 3rd edition (in Japanese)
Yuhikaku 2021
Time, Risk and Income Taxation: Theory of Timing of Taxation
Yuhikaku 2019 ISBN:9784641227484
『現代租税法講座第1巻理論・歴史』
日本評論社 2017

Lectures and oral presentations (12)：

AI and Tax System
(The 13th IMF-Japan High-Level Tax Conference For Asian Countries 2024)
Tax and Fiscal System in the era of COVID-19: From the viewpoint of Intergenerational Equity and Interregional Equity
(19th Asian Law Institute Conference 2022)
A New Japanese Lump-sum Tax on Individuals and Its Constitutionality: Regional Cost-of-Living Adjustment
(Harvard Law School, East Asian Legal Studies Program, Japanese Law Conference 2018)
International Aspects of the U.S. Tax Reform and the New Tax Games
(The Ninth IMF-Japan High-Level Tax Conference for Asian Countries 2018)
Innovation and R&D Tax Incentives in Japan: From imitation to innovation
(46th The Japanese Society for Tax Law 2017)

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Education (3)：

Professional career (1)：

Work history (9)：

2021/04 - 現在 The University of Tokyo Graduate Schools for Law and Politics Professor
2025/03 - 2025/03 Columbia University Law School Visiting Professor
2020/04 - 2021/04 The University of Tokyo Graduate Schools for Law and Politics Associate Professor
2017/01 - 2020/03 Hitotsubashi University School of International and Public Policy Associate Professor
2015/04 - 2020/03 Hitotsubashi University Graduate School of Law Associate Professor

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Awards (2)：

2020/11 - Sozeishiryokan 29th Sozeishiryokan Award "Time, Risk and Income Taxation: Theory of Timing of Taxation" (Yuhikaku, 2019)
2012/11 - Japan Institute of Business Law Japan Institute of Business Law Prize Fundamental Theory of Timing of Taxation (1)(2)(3)(4)(5)

Association Membership(s) (2)：

日本公法学会 , 租税法学会

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