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
The record-breaking heat in late July 2025 in Japan would not have occurred without global warming
- August 8, 2025
An analysis of the record-breaking heat event in late July 2025 using the WAC Japan method indicates the influence of human-induced 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.
WAC Japan Contributors
Yukiko Imada, Dr.
Associate Professor, Atmosphere and Ocean Research Institute, The University of Tokyo
Tomonori Sato, Dr.
Professor, Faculty of Environmental Earth Science, Hokkaido University
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
Nobuhito Mori, Dr.
Professor, Disaster Prevention Research Institute, Kyoto University / Yokohama National University
Masahiro Watanabe, Dr.
Professor, Atmosphere and Ocean Research Institute, The University of Tokyo
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)