I have not seen anyone mention it yet so I will do the honors:
Art Pop Entertainment will host a 2-day (August 30 & 31) event「アートポップな同窓会」to commemorate the label’s 25th anniversary. It will feature active artists but will also include discontinued acts such as 東京ヒーローズ (Tokyo Heroes), 白黒キネマ (Monokuro Kinema), and マモノ (Mamono).
Announcement on X (Twitter):
https://x.com/Artpop_event/status/1926563903208575086