We will have the 22nd online colloquium “Extreme Universe Colloquium” on February 13th (Tue) 10:00 (JST). The speaker is Prof. Masayuki Hashisaka (University of Tokyo, ISSP). For details, please refer to the poster. If you have not registered yet, please register at our online event website at least three days prior to the colloquium. (It is not necessary to register again if you have done it already.)