The Emperor and Empress of Japan received a ceremonial welcome as their state visit began on Tuesday.
The King and Queen greeted their guests on Horse Guards Parade, where some of the nation’s most prestigious regiments were on display.
The Prince of Wales had escorted the emperor and empress from their overnight residence.
The three-day state visit comes in the midst of a General Election.
The emperor inspected the guard of honour, accompanied by the King, who walked a few paces behind his guest.
At the end of the welcome ceremony was the traditional carriage procession to Buckingham Palace for a private lunch.
The two heads of state sat together in the lead coach, followed by Camilla and the empress, who has an allergy to horse hair and as a precaution wore a face mask.