Yiyi Ju
Research Scholar
Integrated Assessment and Climate Change Research Group
Energy, Climate, and Environment Program
Research Scholar
Sustainable Service Systems Research Group
Energy, Climate, and Environment Program
Biography
Ju Yiyi works as a research scholar in the IIASA Energy, Climate, and Environment Program.At IIASA, she mainly works with the application and development of the Integrated Assessment Model (IAM) MESSAGEix. She is the main modeler responsible for providing long-term scenarios to the Network of Central Banks and Supervisors for Greening the Financial System (NGFS) since its 5th phase. She also led the draft of the Note on Key Assumptions of NGFS Long-term Scenarios.
Her research expertise extends to broader stakeholder engagement through the United Nations Environment Programme Finance Initiative (UNEP FI). She contributed detailed sectoral analysis to the UNEP FI Sector Explorer, a tool supporting financial institutions in setting science-based targets and assessing sectoral climate pathways aligned with global climate goals.
Beyond her work on financial-sector and investment modeling, she also conducts research with a focus on climate policy instruments and industrial decarbonization (explored in other EU Horizon projects such as ELEVATE and NEWPATHWAYS).
From 2021 to 2023, she was an assistant professor at the Waseda Institute for Advanced Study (WIAS) of Waseda University in Japan, focusing on the modeling of industry technologies in energy-economic and integrated assessment models. Prior to that, she worked as a project researcher and then assistant professor in the Institute for Future Initiatives (IFI) at the University of Tokyo from 2019 to 2021, mainly involved in the Japan model intercomparison project (JMIP) research activities.
She holds a PhD in international development with a focus on environmental economics from Nagoya University, Japan.
Last update: 26 NOV 2025
Publications
Washizu, A., Ju, Y. , Yoshida, A., Tayama, M., & Amano, Y. (2024). Modeling the distributed energy resource aggregator services in a macroeconomic framework: The application to Japan. Energy 312 e133561. 10.1016/j.energy.2024.133561.
Yang, L., Yanhui, L., Ju, Y. , & Kiyoshi, F. (2024). Forecasting the echelon utilization potential of end-of-life electric vehicle batteries: a province-level investigation in China. Clean Technologies and Environmental Policy 10.1007/s10098-024-03072-x.
Sferra, F., van Ruijven, B. , Brutschin, E. , Ju, Y. , & Riahi, K. (2024). Investigating national differences in fossil fuel phase-out strategies. DOI:10.5281/zenodo.13986071. In: IAMC 2024 Digital Poster Festival, 22-23 Octiber, 2024, online.
Wiedenhofer, D., Streeck, J., Wiese, F., Verdolini, E., Mastrucci, A. , Ju, Y. , Boza-Kiss, B. , Min, J. , Norman, J.B., Wieland, H., Bento, N., Godoy León, M.F., Magalar, L., Mayer, A., Gingrich, S., Hayashi, A., Jupesta, J., Ünlü, G. , Niamir, L. , Cao, T., Zanon-Zotin, M., Plank, B., Vélez-Henao, J., Masanet, E., Krey, V. , Akimoto, K., Grubler, A. , van Ruijven, B. , & Pauliuk, S. (2024). Industry Transformations for High Service Provisioning with Lower Energy and Material Demand: A Review of Models and Scenarios. Annual Review of Environment and Resources 49 249-279. 10.1146/annurev-environ-110822-044428.
Ita, S., Washizu, A., & Ju, Y. (2024). Better social infrastructure matters: Impacts of perceptional and behavioral smartization on food-related household emissions and wastes. Urban Climate 56 e102007. 10.1016/j.uclim.2024.102007.