Belle and Sebastian are headed back to Japan, but are not quite as you remember them. For nearly 20 years the Glasgow indie darlings have been pigeonholed as producers of twee, lovelorn songs for corduroy-clad outcasts, but with their newly released ninth album, that stereotype is in danger of looking outdated: "Girls in Peacetime Want to Dance" is as concerned with the dance floor as it is the state of the world in which it was conceived.