FILE - Britain's King Charles III, left and Japans Emperor Naruhito ride in a one carriage during the ceremonial welcome for the State Visit to Britain of the Emperor and Empress, in London, Tuesday, June 25, 2024. Naruhito and the Empress Masako, who studied at Oxford a few years after her husband, wrapped up a weeklong trip to Britain on Friday. Their itinerary combined the glitter and ceremony of a state visit with four days of less formal events that gave the royal couple an opportunity to revisit their personal connections to Britain. (AP Photo/Kin Cheung, Pool, File)