Hello, I am also hoping to do animation. Art University Bournemouth has a great reputation.
I recommend actually going to open days to look at all the different courses though, to see for yourself which you like and would be right for you. Then you can also ask tutors there any questions you have. I've been to a lot of open days, and every course at every university is so different!
Check out Hertfordshire University's animation course too.
They do various animation degrees; 2D, 3D, VFX, and Games Art.
Also, Duncan of Jordanstone, their 2D animation looked good.
It really sounds like you need to ask some tutors loads of questions at open days, and look at the details/structures of courses when on university websites. And check showreels! Compare different university's showreels.
I'm not sure how to advise you on when you talk about "Japanese style", but I will say, when you do your portfolio, definitely make sure you show you have great realistic and observational drawing skills, as well as anything stylised/cartoony. You can teach anyone great things who can draw already, but if all you've ever drawn is Japanese cartoons, it's a bit harder to know if you've got the skills needed to do animation. I hope that I make sense there.
Hope I helped