administrator in Kanji

In general, it refers to a person who manages, operates and manages facilities and organizations, or such an organization.
In Japan, there are various jobs just for managers.
a caretaker for an apartment house.
A person who manages the facilities, hygiene, and security of real estate.

A person who oversees, takes responsibility for, or directs something.
business related to the management of workers. director of store operations.

A user who has successfully applied for the authority of the Internet or a net program and has been trusted.
a person responsible for information control. information management supervisor. a person in charge of information management.

Japanese says “Kan ri sha”.