So a 9 year old would be watching Higurashi no Naku Koro ni, which has graphic visualizations of torture (nails driven in to each finger joint, disembowelment while still alive, chained to a cross and being stabbed until death, etc.) and murder? Or perhaps Elfen Lied, with a heavy amount of violence usually resulting in the victim's body being separated in to more than one part? Okay then. Go on, children!
I'm not emphasising that these shows are great because of violence, they have brilliant stories, both with great morals, however graphic violence is not something a 9-year-old should be watching.
Also consider shows such as Ghost in the Shell, which involve adult themes and which are very philosophical in meaning.
Warning: spoilers.
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