成せい人じん指し定てい

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Meanings

1

noun

adults only; rated for adults only

Used for content, products, or areas restricted to adults, such as adult videos, age-restricted websites, or adult-only sections.

turn into, become, get

人person

指finger, point to, indicate

定determine, fix, establish

成せい人じん向むけ
成人向け means 'for adults' or 'adult-oriented' and is broader, while 成人指定 specifically means 'designated/rated for adults only', often with a legal or age-restriction nuance.

Compound of 成人 (adult) and 指定 (designation).