We will have the 5th online colloquium “Extreme Universe Colloquium” on Apr. 25 (Mon) 10am (JST). The speaker is Prof. Jiro Soda (Kobe University). For details, please refer to the poster. If you have not registered yet, please register at our online event website by Apr. 20 (Wed). (It is not necessary to register again if you have done it already.)