There are several new updates up on the Japanese side.
The official Biohazard Revelations site has been updated. You can find some new wallpapers for download.
The official Biohazard 6 site can be accessed here. There's nothing interesting yet except for the trailer, as well as the retail information. It seems the Japan will only get the game 2 days after the game launch in the US.
The official youtube channel and facebook page for the Biohazard series are up now too. They are in Japanese, but there's no harm following them: