Jun Arima is a Professor in the Graduate School of Public Policy, the University of Tokyo since August 2015. 

He currently holds the Professorship at the University of Tokyo, he serves as Project Leader for the 21 st Century Public Policy, a Distinguished Senior Research Fellow at the Asia Pacific Institute of Research and a Consulting Fellow at the Research Institute of Economy, Economy, Trade and Industry, Senior Policy Fellow for Energy and Environment, Economic Research Institute for ASEAN and East Asia (ERIA). He is also a Lead Author of the Intergovernmental Panel of Climate Change (IPCC) 6th Assessment Report.

Consulting Fellow Research Institute of Economy, Trade and Industry (RIETI), Distinguished Senior Research Fellow, Asia Pacific Institute of Research (APIR), Senior Policy Fellow, Economic Research Institute of ASEAN and East Asia (ERIA), Lead Author of the IPCC 6^th Assessment Report

His publication includes “Energy Policies of the IEA Countries” (2003-2006 editions), “Memoir of the Kyoto Protocol” (2014), “Truth of Global Warming Negotiation – Economic War on National Interests-“(2015), “Global Warming Countermeasures with Pragmatism – Paris Agreement and Thereafter” (2016), “Trump Risk – America First and Global Warming” (2017), “Policy Recommendations by the Quadripartite Commission on the Indian Ocean Regional Security” (Chapter 2) (2017), “Japan’s Energy Conundrum” (Chapter 11) (2018), “Finding a Viable Path for Reducing GHG Emissions2 (2019 King Abdullah Petroleum Studies and Research Center (KAPSARC), “Eco-fundamentalism as a Grist to China’s Mill” (2021), “Eco-fundamentalism will ruin our country” (2021). “Eco-Fascism –Diseases calling for Decarbonization, Renewables and Nuclear Phase-out” (2022 Joint Authorship)