qualified person; eligible person
Refers to someone who meets the requirements for a role, position, or benefit. Often used in legal, administrative, or formal contexts.
Those who are eligible for this system, please submit an application.
He was recognized as a qualified person for the position.
適任者 means a suitable person for a specific task or role, stressing aptitude rather than formal eligibility.
Compound of 適格 (qualification, eligibility) and 者 (person). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for forming agent nouns.