FILE - In this file photo provided by the Imperial Household Agency of Japan, Princess Yuriko, wife of the late Prince Mikasa, poses for a photo at her palace residence reception room in Tokyo, May 22, 2023. (Imperial Household Agency via AP, File)

In this file photo provided by the Imperial Household Agency of Japan, Japanese Prince Mikasa, right, and his wife Princess Yuriko talk at their residence in Tokyo, Nov. 16, 2015. (Imperial Household Agency of Japan via AP, File)

FILE - Princess Yuriko of Mikasa, fourth left, with Crown Prince Akishino, from left, Crown Princess Kiko, Princess Kako, Princess Nobuko of Mikasa and Princess Akiko of Mikasa, waves during the New Year's appearance by the Japanese royal family at the Imperial Palace in Tokyo, Jan. 2, 2023. (Tomohiro Ohsumi/Pool Photo via AP, File)