2026 Full-Day Starry Sky Course at Sekizaki Kaiseikan, Saganoseki

Sekizaki Kaiseikan night-opening days, such as full moon viewing events, are held on a case-by-case basis rather than daily. The planetarium is fully reservation-based (500 yen for adults, 250 yen for high school students, 100 yen for elementary and junior high school students; museum admission itself is free), and reservations are made through the online reservation system (Reserva) or the inquiry form on the official website. Please check the official website (https://kaiseikan.jp/) for night-opening dates and be sure to reserve in advance before visiting.