Old age; the later period of life, often associated with aging-related issues.
老年になると運動習慣を続けることが健康に重要だ。
As people reach old age, maintaining an exercise routine becomes important for health.
老年期の認知症予防についての講座に参加した。
I attended a seminar about dementia prevention in old age.
高齢化によって老年人口の割合が増えている。
Due to population aging, the proportion of elderly people is increasing.