I know just cause its anime it not always intended for children. But this one just seems very likely to be. I mean its an anime about hitmen where pretty much no one dies I think the worse anyone gets, even when being cut up by swords is a bloody lip or cheek scratches and everything can be solved with the power of friendship. If baddies die they just kinda poof ala digimon regardless of method of death. It just has all the conventions of an action anime for a younger audience and the subject matter is relativally light most of the time excluding that one caviat.