We are offering special nighttime rentals of Okayama Castle’s Tenshu (main keep)

Okayama Castle's main keep is available for rental from 5:30 PM - 9:30 PM. Why not spend a special time in a unique setting at Okayama Castle for parties or social gatherings? In conjunction with the nighttime use of the main keep, it is also possible to host a party in the plaza in front of the keep, with the illuminated castle as the backdrop.

https://okayama-castle.jp/gather-utilization/