The government has decided to implement the 'manbou' (short for measures to prevent the spread of the new coronavirus) to prevent the spread of the new coronavirus.

The fire doors of this building must always be kept closed.

He pushed the revolving door and entered the building.

He opened the door and entered the room.

You must never show this secret key to anyone else.

He was caught by the secret police.

He believes that there is a secret base on that island.

He is rumored to be a member of a secret society.

It's rare to find a basket star on the sea floor.