Instead of the Gregorian calendar? I prefer the Japanese calendar, but I have a Samsung Galaxy S4 which only has the Gregorian calendar. I know that mobile Apple devices (iPhone, iPod, iPad), have an option to change to the Japanese calendar. Are there any other brands of phones that have the Japanese calendar instead of the Gregorian calendar, or an option to change to the Japanese calendar? I couldn't find any apps from the Play Store. All the Japanese calendar apps still use the Gregorian calendar.