Version 4.0.2080 of Google Earth is out, and it adds several new capabilities. The primary new capability is official support for Japanese navigation -- some areas were previously supported, but this new version offers official support. Likewise, several new Japan-centric features have been added, such as vastly improved maps for Japan, including 3D display capabilities for Tokyo, Osaka, other major cities, and even 3D display capabilities for people's houses. Apparently the ability to display 3D houses is not available for other countries yet. Hit up this page to download it.