I think I do incidentally own something, I've got the Date A Live VN in the big box edition which came with a kurumi pillow.. although I dont know how large it is as its still sealed. We do love Kurumi though

1996FordMondeo Some people like the long pillows, I can imagine it being comfy but I don't sleep in a position that benefits from it, i'd just end up using one as a normal pillow