First reported by AV Watch Impress, the PS5 controller buttons will see a bit of a shakeup. The X button will now be the universal method to confirm in system and game menus. To players in the West, this may not sound like a change at all. However, there’s quite the history as to why O has always been confirm on PlayStation consoles in Japan, not X. A Sony PR person confirmed to AV Watch, “The purpose of this change is to avoid situations where the confirm button is different between the system menus and the game.” Since the PS1, the rightmost of the face buttons, O, has always been confirm for PlayStation hardware in Japan. This was a trend that Sony followed from Nintendo, as Nintendo controllers from the SNES onward have always used the rightmost button, the A button, as confirm in all regions.
Photo courtesy of https://av.watch.impress.co.jp/