stakeholder; interested party; person concerned
Refers to any individual or group with a stake or interest in a matter, often used in business, legal, or policy contexts.
We need to identify the stakeholders of this project.
利害関係者の意見を聞いてから決定します。
We will decide after hearing the opinions of the interested parties.
利害関係者 (stakeholder) emphasizes having a stake or interest in the outcome, whereas 当事者 emphasizes direct involvement in the act or dispute itself.
Compound of 利害 (interests, advantages and disadvantages) + 関係者 (related person). The term is a direct translation of the English 'stakeholder' and is widely used in modern business and legal Japanese.