This is the 1557th most frequent Japanese word.
入口
Entrance.
General term referring to an access point.
入口があります。
There is an entrance.
Specifies the location of the entrance within a specific context.
博物館の入口は左側です。
The entrance to the museum is on the left side.
The word as a signage label indicating an access point, emphasizing the proper usage of the area.