Never watched Ranma 1/2, but someone should mention this concern to Phil. I mean, at least move it or put an adult content block on it, so that kids don't see it.
I'm a grown man, and don't even want to see it. I never thought that chibi? hentai was a good idea. People defend that it is artwork, but to me, it's a fill-in for something much more heinous. You can all guess what I'm talking about - there's no use in bringing the words up here.
I bring up Touhou again, but that's because those characters also get lumped into this category. A simple rule of thumb to follow is this:
"If it's under age, it doesn't belong on the internet, art or otherwise."
Phil has no idea that this could ruin his reputation. But I'm afraid it's already too late for that.