Japanese phrase
___歳未満は利用できません。 ___ sai mi man wa ri yō de ki ma se n
Meaning
People under ___ cannot use it.
When to use it
Says that people below a stated age cannot use a service. Common in rules and notices, it sounds direct and somewhat formal.
Example dialogue
このアプリ、使える？ ko no a pu ri tsuka e ru
Can this app be used?
18歳未満は利用できません。 18 sai mi man wa ri yō de ki ma se n
People under 18 cannot use it.