Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

In this photo provided by the Imperial Household Agency of Japan, Japan's Crown Prince Akishino, in orange robe, flanked by his wife Crown Princess Kiko, second from left, attends a ceremony for formally proclaims Akishino is the first in line to the Chrysanthemum Throne, with Emperor Naruhito, second from right, and Empress Masako, right, at the Imperial Palace in Tokyo, Sunday, Nov. 8, 2020. Akishisho, Naruhito's younger brother, was formally sworn in as first in line to the Chrysanthemum Throne in a traditional palace ritual that has been postponed for seven month and scaled down due to the coronavirus pandemic. (Imperial Household Agency of Japan via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

In this photo provided by the Imperial Household Agency of Japan, Japan's Crown Prince Akishino, in orange robe, flanked by his wife Crown Princess Kiko, attends a ceremony for formally proclaims Akishino is the first in line to the Chrysanthemum Throne, in front of Emperor Naruhito, left, and Empress Masako, second from left, at the Imperial Palace in Tokyo, Sunday, Nov. 8, 2020. Akishisho, Naruhito's younger brother, was formally sworn in as first in line to the Chrysanthemum Throne in a traditional palace ritual that has been postponed for seven month and scaled down due to the coronavirus pandemic. (Imperial Household Agency of Japan via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)

In this photo provided by the Imperial Household Agency of Japan, Japan's Crown Prince Akishino, second from left, flanked by his wife Crown Princess Kiko, left, attends a ceremony for formally proclaims Akishino is the first in line to the Chrysanthemum Throne with Emperor Naruhito, center left, and Empress Masako, center right, at the Imperial Palace in Tokyo, Sunday, Nov. 8, 2020. Akishisho, Naruhito's younger brother, was formally sworn in as first in line to the Chrysanthemum Throne in a traditional palace ritual that has been postponed for seven month and scaled down due to the coronavirus pandemic. (Imperial Household Agency of Japan via AP)

Japanese Crown Prince Fumihito, better known as Prince Akishino, leaves the Imperial Palace after being formally declared first in line to succeed the Chrysanthemum Throne during a ceremony Sunday, Nov. 8, 2020 in Tokyo, Japan. (Carl Court/Pool Photo via AP)