A Review Of 成人网
You can not do this with 成人. It is also a lot more formal than 大人 so It really is way more prevalent to use 大人 in daily speech. Also 成人になる particularly implies "to turn twenty". 大人になる generally signifies "to become experienced". 芳一は来年成人になる -> OkayIf you think that of those kids expanding into adul