[truehappiness]

Usually in the past the reason was because she also had a release coming out at the time. It would also take advantage of the 2 weeks for the last "week" of the year saleswise to maximize "first week" sales. That was also why a lot of people thought that with every release, something scandalous would also be mentioned since glitter/fated and how the Nagase breakup was announced JUST before that release. And a lot f releases after that had something that was 'big news' alongside an album or single but the single "news" was not as common.