The Japanese website has updated yesterday. It’s a big update but there isn’t anything really new. They’ve added a “Story” page, they’ve updated the “Characters” page with Jihl and Yaag (combined under “The Sanctum” ), a new message from Yoshinori Kitase was posted and a “Spec” page has been added.
They also added a Special page which features 3 special things about the game: The elixir, the theme song and a third item which is still unknown. The trailer page will probably be updated during Tokio Game Show later this month:
View the site here: http://www.square-enix.co.jp/fabula/ff13/