related party; connected person
Used in legal, business, or formal contexts to refer to individuals or entities with a relevant connection or interest.
A related party is involved in this transaction.
Transactions between related parties must be disclosed.
利害関係者 (stakeholder) emphasizes having a direct interest or stake, while 関連当事者 focuses on a formal connection or relationship, often in legal or contractual contexts.
Compound of 関連 (かんれん, 'relation') + 当事者 (とうじしゃ, 'party concerned'). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.