Shin Chan is a show based on a very naughty child. He is always up for some prank or the other and his mind is always cooking something to trouble the others. Although it is fine for children to watch cartoons of this sort, Shin Chan according to me has crossed the limit.
If you see the cartoon show, you will notice that the little boy is not behaved very well and does not talk appropriately to his parents. A very little kid is shown eve teasing and flirting with old women, although in a fun manner but inappropriate. Since little kids watch this show, they pick such things very quick and then implement it in their daily lives. This is not healthy for their growth.
I guess this TV Show was banned as well due to this reason.
Please do not let your child watch this cartoon show as it does not teach good things.