ことになっているEstablished rule or arrangement
Describes a rule, procedure, schedule, or arrangement that is already established. It focuses on the rule or arrangement itself rather than on who decided it.
What the pattern presents
ことになっている presents the current standing state of a rule or arrangement. Depending on the context, natural English translations include “the rule is,” “is required to,” “is not allowed to,” and “is scheduled to.”
Rules and schedules
Both positive and negative rules use the plain nonpast verb before the construction. A settled schedule uses the same form.
Why the decision maker disappears
This pattern is useful when the important fact is that a system or arrangement is in force. The person or group that originally made the decision is normally left unstated, even when everyone understands that a school, company, organizer, or other authority established it.
External rule or personal choice?
ことになっている describes an established rule or arrangement. By contrast, ことにしている describes a routine that the subject deliberately follows as their own choice.
会社では毎朝九時までに予定を共有することになっていますが、私は前日の夜に入力することにしています。
At the company, schedules are to be shared by 9 each morning, but I make a point of entering mine the night before.
AnalyzeThe first part reports a company rule; the second identifies the speaker's own chosen routine.
More examples
社員証は建物の中で常に身につけることになっています。
Employee ID badges must be worn at all times inside the building.
Analyzeこの寮では、午後十時以降は洗濯機を使わないことになっている。
In this dormitory, washing machines are not to be used after 10 p.m.
Analyze明日の見学は、駅前に八時半に集合することになっています。
For tomorrow's tour, the group is scheduled to meet in front of the station at 8:30.
Analyze会議の資料は前日までに共有することになっている。
Meeting materials are to be shared by the day before.
Analyze雨の場合、試合は翌週に延期することになっています。
If it rains, the match is to be postponed until the following week.
Analyze新しいバスは来週月曜日から運行を始めることになっています。
The new bus service is scheduled to begin operating next Monday.
Analyze