Extreme weather event attribution in Japan
Weather Attribution Center Japan (WAC Japan) assesses how human-induced climate change as well as other climate variability affect the likelihood and intensity of extreme weather events across Japan and shares these findings with the public.
Latest Analysis
Record Heat in Mid-to-Late July 2026: Occurred Even During El Niño, Could Not Have Happened Without Global Warming
- August 3, 2026
An analysis of the record-high temperature event in mid- to early-late July 2026 in Japan using the WAC Japan method indicated that extreme heat of this level could not have occurred without global warming.
ANALYSIS
Advancing attribution science: The WAC Japan approach
写真提供 朝日新聞社
Answering with Science: “Is this unusual weather due to global warming?”
Publishing scientific assessments on how human-induced warming and other climate variability influence extreme weather events in Japan.
写真提供 朝日新聞社
Rapidly releasing highly reliable analyses
Publishing analyses immediately after extreme weather events, when public interest is at its peak.
写真提供 共同通信社
Employing an analytical system tailored to Japan
Delivering highly accurate analysis that considers regional characteristics through a specialised research team and event attribution system focused specifically on Japan.
Our People
Co-Chair
Masahiro Watanabe, Dr.
Professor, Atmosphere and Ocean Research Institute, The University of Tokyo
Nobuhito Mori, Dr.
Professor, Disaster Prevention Research Institute, Kyoto University / Yokohama National University
Yukiko Imada, Dr.
Associate Professor, Atmosphere and Ocean Research Institute, The University of Tokyo
Research Fellow
Chihiro Takahashi, Dr.
Project Assistant Professor, Atmosphere and Ocean Research Institute, The University of Tokyo
Tetsuya Takemi, Dr.
Professor, Disaster Prevention Research Institute, Kyoto University
Tomonori Sato, Dr.
Professor, Faculty of Environmental Earth Science, Hokkaido University
Advisor
Masahide Kimoto, Dr.
Professor Emeritus, The University of Tokyo / Former President, National Institute for Environmental Studies
Shuhei Maeda
Former Forecaster, Japan Meteorological Agency / Director, Department of Atmosphere, Ocean and Earth System Modeling Research, Meteorological Research Institute
Information for Journalists
Journalists are invited to subscribe for the latest updates and press releases from WAC Japan via the link below.
WAC Japan operates with secretariat support from Climate Dialogue Japan (CDJ)