The 5th Annual Meeting of the Grant-in-Aid for Transformative Research Areas (A) “Extreme Universe” will be held from Friday, December 26 to Sunday, December 28, 2025, in Matsuyama, Ehime Prefecture. This meeting will feature research presentations by both the Planned Research Groups and the Publicly Offered Research Groups within the project. Poster presentations by participants are also planned. Poster awards will be given to outstanding presentations by postdoctoral researchers and students. We encourage your active participation. For details including registration, please visit the official meeting website.