The Sealed Space is a paranormal phenomena at the Flower, Sun, and Rain hotel in Flower, Sun, and Rain. It occurs in Room 402 of the hotel, where a ghost transforms the suite into an empty and dreary space. While the room was refitted a number of years before the game's events, apparently bringing the appearance of the Sealed Space to an end, it reappears the morning after searcher Sumio Mondo arrives at the hotel and takes residence in Room 402. Spiritual medium Sister Phantom explains that it was Mondo's appearance at the hotel which caused the Sealed Space to appear again.
The Sealed Space is laid to rest again when Mondo uses Catherine to activate a camera, taking a photo of a chair.