They try this every few years, and they still haven't stopped the manga. In the end, I think the Japanese government understands that "Cool Japan" will only exist for as long as they keep the laws on free speech open.
I think the 70 year old woman who's pushing this should probabaly try and focus her efforts on real CP. But that's hard, so I doubt she will. Whatever, she's got 10, 20, years left, tops.