Now to actually run the game, most games don't come with it, but you will need to Locale as Japanese this RPG_RT.exe in the game files. Here's the download. http://www.rpgrevolution.com/file/rpg_rt.exe.zip
Sometimes RPG Maker can be a bit annoying if all this above fails. Some easy fixes include missing the Vehicle.png file in the Charset. You can get that here http://uboachan.net/fg/src/1286157334776.png Other times you may need to open RPG_RT.ini in notepad and add the additional line: FullPackageFlag=1