Japan Self-Defense Forces prepare to fire artilleries during the proclamation ceremony of Japan's Emperor Naruhito's ascension to the throne at a park in Tokyo on October 22, 2019. - Emperor Naruhito officially assumed his duties as emperor on May 1, 2019 a day after his father became the first Japanese monarch to abdicate in 200 years, but the transition was not complete until his new role was officially proclaimed in a series of events. (Photo by CHARLY TRIBALLEAU / AFP)