2026 Full-Day Starry Sky Course at Kumagaya City Cultural Center Planetarium

The Kumagaya City Cultural Center Planetarium holds stargazing sessions at its rooftop observatory roughly every Saturday around 19:00 to 20:00 (e.g., September 12 and 26). No reservation is needed; drop-in participation is welcome during the session, and it's free. It may be cancelled due to weather, with the cancellation decision announced around 17:00 on the official X and Facebook accounts. Preschool-age children may not participate.