This is the 8767th most frequent Japanese word.
未成年
"未成年" means "minor" or "underage person."
In this sentence, '未成年者' (minors) is used to denote individuals who are not yet of legal age in the context of facility usage restrictions.
この施設は未成年者専用です。
This facility is exclusively for minors.
Here, '未成年' refers to the period in life before reaching adulthood, emphasizing the importance of education during this time.
未成年のときに、法律について学ぶのは重要です。
It is important to learn about the law during one's minor years.
In this example, '未成年' designates a person's status as underage, particularly in relation to legal drinking age restrictions.