I checked it. It's:

The ESRB rating is Teen. The description associated with that rating, as described on the ESRB site itself includes:

Blood
Language
Sexual Themes
Use of Alcohol
Violence

The Japanese rating is "Cero C", which is 15+.

The general European rating is "PEGI 16", which is 16+

But most countries make their own rules and ignore that.
Why? I really don't know. :/