おくじょう屋上okujou
1.
The flat surface located at the top of a building, designed for accessibility and often used for recreational or decorative purposes.
2.
The uppermost section of a structure, typically constructed to provide a space where people can go outside, often characterized by having a level roof.
3.
A specific area atop a building that serves as a terrace or garden, allowing individuals to enjoy the outdoors away from the ground level.
Example:
デパートの屋上にアドバルーンが上がっている。