Re certain elements added or removed from the original in order to broaden the filmas appeal for a different audience, and if so, why?

Ringu was remade in America as The Ring, and in South Korea as The Ring Virus. Compare the Japanese original to one of the foreign remakes. Are certain elements added or removed from the original in order to broaden the filmas appeal for a different audience, and if so, why? Or you may compare another J-Horror film (or other East Asian horror movie) to its Hollywood remake. Some suggestions: Ju-On/The Grudge; Kairo/Pulse; Dark Water; One Missed Call; The Eye (Hong Kong); A Tale of Two Sisters/The Uninvited (South Korea).