11:00-20:00 year-round per the AKIBA Cultures Zone shop page; Astop on the same 4F closes at 20:30. Individual pop-up events can change the opening time and entry rules, so check the official site.
Enter through the 1F Lashinbang entrance and take the elevator or stairs to 4F; the pop-up space shares the floor with the Astop rental-showcase room of glass cases.
Tips
Not a permanent shop but a limited-run pop-up space, so the titles on sale change with each event; check the schedule on the official site (culpop.astop.co.jp) before going.
Besides exhibitions and merch sales it hosts signing sessions, handshake events and cosplay events.
It adjoins the Astop rental showcase on the same 4F, so you can see both in one stop; Astop closes at 20:30, Culpop at 20:00.
A second Culpop opened in 2026 inside Akihabara Radio Center (Sotokanda 1-14-2, 2F), so check which branch an event is at.