The Japanese graphics are very good, I have to admit. I would post some of the content on my website so folks could see what I am upset about, but I am afraid it would be considered child pornography.
As I mentioned, there is an entire subset of Japanese animation that is definitely off the deep end as far as offensive and pornographic content is concerned.
Overall, there are three distinct areas of anime: the more basic "cutsy" type of animation that is specifically geared toward children; the more adult anime that has more mature stories, storylines and content (not unlike our dramatic presentations or more adult cartoons), and finally the really off-the-deep-end offensive stuff. Japanese culture has evolved around these forms, especially the first two that I mentioned. There's quite a bit of science fiction involved, again as is tied to their culture.
All anime is not bad -- it is simply incumbent upon us as parents to pay close attention to what our children are watching and reading.
Gunsmith Cats, if/when contained within a library, should be in the adult section, not the children's section. It is a crime-drama, and is very violent. The stories wouldn't get a second glance from children if they were in novel form, yet the stories would make for decent mystery literature on the shelves along side most hard-boiled crime dramas.
Unfortunately, because they are animated, many people automatically think they are for kids. They are not.