No entry Japanese

The answers to floors 1, 2, 4 and 3 are all correct.

The usage is somewhat different.

It is prohibited to enter without permission (たちいりきんし). It is used at the door of a room or an office, meaning that idlers are not allowed to enter. Or it is used on the subway station platform, which means entering with caution because of danger.

入るべからず (ha i ru be ka ra zu) is used to prohibit entry on lawns in parks, etc. The forbidden command tone of this べからず is very strong. A slogan used to regulate people's behavior in places such as parks.