Ordinary admission is free. Pool individual-use prices listed by the operator are ¥250 for elementary/junior-high pupils, ¥500 for high-school/technical-college/university students and ¥750 for other visitors. Confirm the applicable category, including preschool children, with the pool. Events, exclusive facility bookings and outdoor experiences are separate.
The official map lists multiple outdoor toilets and dome toilets; Moon Sea has a rest building with changing/shower facilities. Locate the nearest usable toilet on arrival rather than assuming every building is open. Ask staff about nursing, changing and accessible-toilet provision for your planned area.
TOTOMATO is an on-site cafe/dining option. Check its current service before relying on a meal there; bring water and a picnic if flexibility matters. A general park visit does not reserve a table or guarantee food vendors.