1.
person concerned; parties involved; stakeholder
Someone who is involved in or connected to a particular matter, organization, or event. Often used to indicate authorized personnel or people with a connection to a situation.
関係者以外立入禁止。
No entry except for authorized persons.
事件の関係者から話を聞いた。
I spoke with people involved in the incident.
学校の関係者によると、来年度からカリキュラムが大きく変わるそうだ。
According to school officials, the curriculum will change significantly starting next year.
関係者 is a compound of 関係 (relation) + 者 (person). It covers a broad range of meanings from "authorized personnel" (on signs) to "parties involved" (in news reports) to "stakeholders" (in business).
COMMON COLLOCATIONS:
- 関係者以外立入禁止: no entry except authorized personnel
- 関係者各位: to all concerned parties (formal notices)
- 関係者によると: according to those involved
- 関係者に聞く: to ask the people involved
SIMILAR COMPOUNDS WITH 者:
- 担当者: person in charge
- 責任者: person responsible
- 当事者: the party directly concerned
NOTE:
The sign 関係者以外立入禁止 is one of the most commonly seen restriction signs in Japan.