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For realizing better environmental policymaking

Associate Professor

7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
Sophia University
Building No.2, Room 1620


Research Interest

Environmental Policymaking Process, Japanese and Chinese Environmental Policy, Energy and Climate Change Policy

Ongoing Research Project

2016 - 2018
Analysis of Effects of Chinese Carbon Emissions Trading Scheme (ETS)


  1. Okazaki, Y. (2017). Support Machanism for Environemtal Measures. In H. Minamikawa et al, Japanese Environmental Issues: Improvement and Experiance. Beijing, China: Social Science Academic Press. (link in Chinese)
  2. Okazaki, Y. (2017). Experience of Air Pollution Control in Japan. In J. Pan & J. Dan (Eds.), Blue Book of Cities in China: Annual Report on Urban Development of China No.10. Beijing, China: Social Science Academic Press.(link in Chinese


  1. “Effects of state policies on renewable energy capacity and generation”, "Master’s Thesis. Georgetown Public Policy Institute, 2006. (link)
  2. “Progress and prospect of Carbon Pricing Policy in Japan and China,” Global Environment, Sophia University (11), 2015, pp.143-151 (link)
  3. Okazaki, Y. (2017). Progress of carbon dioxide emission trading system in China, Global Environmental Studies, Sophia University (12), pp. pp.33-46(link
  4. Okazaki, Y. (2018). Experiences and Challenges of Environmental Cooperation in Northeast Asia, Global Environmental Studies, Sophia University (13), pp.21-32


  1. “China PM2.5 traces found, Japan claims”, Global Times, 2013-2-5 (link)
  2. “Expats reconsider living in Beijing over growing pollution”, Global times, 2013-4-18 (link)
  3. “Japan offers pollution help amid strained ties”, Global times, 2013-4-27 (link)
  4. "China, Japan, Korea carbon market links resurface as talks set for next week", Carbon Pulse, 2017-12-15 (link)
  5. "China to create world's largest cap-and-trade program", Nikkei, 2017-12-19 (link)
  6. "Kickstart your business in Japan"(Video), EU Gateway, 2018-2-8 (link)


  1. "Japanese Climate Change Policy", 2010-7-4, Chinese Academy of Social Science
  2. "CVIS and Vehicle Networking - Cooperation Project between Japanese Government and DRC Beijing", 2012-5-22, China Beijing International Fair for Trade in Services
  3. "Biodiversity Policies in Japan", 2012-12-10, Japan-China Joint Training Program for the Third Countries in the Field of Environmental Protection
  4. "Japanese Environmental Law System", 2013-1-22, Legislative Affairs Commission, National People's Congress of the People’s Republic of China
  5. "Environmental Problems in China", 2013-2-15, Global Environment Forum KANSAI (link
  6. "Environment Management in Japan: Theory and Experience", 2013-4-23, School of Environment & Natural Resources, Renmin University of China
  7. "Japan's Green Economy and Policy", 2013-7-15, International Youth Summit on Energy and Climate Change
  8. "Waste Classification Policy in Japan", 2013-8-1, Legislative Affairs Commission, National People’s Congress of the People’s Republic of China
  9. "Japan's Green Economy and Policy", 2013-10-11, Chinese Academy of Social Science – Japan Society for Promotion of Science Forum 2013 – Ecological Civilization: Managing Development and Economics for Sustainability
  10. "Greening Tax System and Japanese Experience", 2014-3-10, Japan-China Environment Tax Seminar
  11. "Air Pollution and Economic Instrument", 2015-3-5, Japan-China Environment Tax Seminar
  12. "Facing PM2.5 pollution in Beijing", 2015-6-5, Nikon Corp.
  13. "Renewable Energy Policy in Japan", 2015-7-1, China New Energy Chamber of Commerce
  14. "Tokyo Air Pollution Court Case: Experience in Tokyo and Beijing", 2015-7-9, Law School of Hitotsubashi University
  15. "Environmental Problems in China", 2015-12-12, Kanagawa Japan-China Friendship Association
  16. Moderator, Green Finance Session, 2015-12-15, Japan-China-Korea Green Finance Seminar
  17. "Building Environment Energy Oriented Local Society", 2016-2-15, Nagano Prefecture
  18. "Japanese Experience of Pollution Control", 2016-3-2, Northeast Normal University, China (link)
  19. "Global Environment Problem", 2016-3-19, Board of Education, City of Chigasaki
  20. Panelist, Arfus Treaty Symposium, 2016-4-6, Japan Federation of Bar Association
  21. "Chinese Emission Trading", 2016-5-13, Japan Federation of Bar Association
  22. "Mitigation Solution and Outlook in Japan", 2016-5-29, Shanghai Forum, Fudan University
  23. "Japanese Watershed Environmental Management Mechanism", 2016-6-7, 20 Years Anniversary Seminar, Sino-Japan Friendship Center for Environmental Protection
  24. "Green Economy", 2016-6-14, Hitotsubashi University
  25. "Japanese Experience of Pollution Control", 2016-8-12, Chinse Academy of Science
  26. "Air Pollution Control: Experience in Tokyo and Beijing", 2016-9-11, Summer School for Environmental Law School, Japan Federation of Bar Association
  27. "Japanese Environmental Policy", 2017-2-22, Taiwanese Environmental Study Group
  28. "Greening Economic Policy", 2017-3-30, Short-term Expert for JICA China Building Environmentally Friendly Society Project, Sino-Japan Friendship Center for Environmental Protection
  29. "Approaches to Address Increasing Complexity of Sustainability Challenges in East Asia", 2017-5-25, Institute of Developing Economies, Japan External Trade Organization
  30. "Climate Change Policy in US and China", 2017-6-3, Seminar, Law School of Sophia University
  31. Moderator, Mainstreaming Biodiversity: Towards Aichi Targets and SDGs, 2017-6-21, Sophia University(link
  32. "Law, Policy and Administrative Practice of Climate Change Policy", 2017-9-16, Summer School for Environmental Law School, Japan Federation of Bar Association
  33. "Renewable Energy in Japan", 2017-9-19, EU Green Gateway to Japan
  34. "Experiences and Challenges of the Tripartite Environmental Minister's Meeting", 2017-10-11, Joint Workshop on Networking for Environmental Sustainability Cooperation in East Asia, Sejong Institute (link)
  35. "Working for the Government: Experiances at Ministry of the Environment and Embassy of Japan in China", 2017-10-25, Association for Studies on Public Affairs, Chiba University
  36. "Experience of Japan-China Environmental Cooperation", 2017-11-4, International Conference on Constructing a Community of Shared Future in East Asia: China, Japan and South Korean Search for Social Reconciliation and Cooperation, Zhejiang University (link)
  37. "Experience of Japan-China Environmental Cooperation", 2017-12-11, Japan-China Environmental Cooperation Seminar, Sophia University
  38. "Japanese Environmental Policy", 2018-3-5, Taiwanese Student Group
  39. "Japanese VOC Emission Reduction Incentive Mechanism and Policy", 2018-3-8, Sino-Japan Friendship Center for Environmental Protection