We will hold the 4th ExU Annual Meeting of the Extreme Universe Collaboration at Osaka University from September 25 to September 28, 2024. There will be reports on research activities and seminars by each of the project groups in this area, as well as oral talks by the principal investigators of the publicly offered researches. For more information, please visit the following website. https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/forth-annual-meeting-sept-25-28-osaka-university/