elderly person; senior citizen
Formal term often used in official or administrative contexts, such as policies, statistics, or respectful references to older adults.
This facility provides services for elderly people.
Employment support for senior citizens has become an important issue.
middle-aged and elderly people
Compound of 高年 (こうねん, 'advanced age') + 者 (しゃ, 'person'). The exact historical derivation is uncertain, but the term follows a common Sino-Japanese pattern for formal nouns.