The new version (ver 2.x.x) the same name as the app icon (change the package name) of "Japanese Castles Tour" has published over again.
The market url of new version app.
"Japanese Castles Tour" is a Android App, which can browse information of castles in Japan.
You can select a castle from list of the regions in Japan.
You can select a castle from the Google Map.
You can view castles position by using camera view.