1.
working adult, full member of society
A person who has entered the workforce and participates in society as a responsible adult. In Japan this marks a significant life stage, typically beginning after graduation when one starts full-time employment. Contrasts with 学生 (student).
Usage
A culturally important Japanese concept with no exact English equivalent. 社会人 marks the transition from student life to the adult working world. It carries connotations of responsibility, independence, and social contribution that go beyond simply having a job.
The term is often used when discussing life milestones, career transitions, and the expectations placed on adults in Japanese society.