In this photo provided by the Imperial Household Agency of Japan, its Emperor Emeritus Akihito and Empress Emerita Michiko pose for a photograph at their residence in Tokyo, Japan, Friday, Oct. 4, 2024, ahead of Michiko's 90th birthday Sunday. (Imperial Household Agency of Japan via AP)

In this photo provided by the Imperial Household Agency of Japan, its Emperor Emeritus Akihito and Empress Emerita Michiko pose for a photograph at their residence in Tokyo, Japan, Friday, Oct. 4, 2024, ahead of Michiko's 90th birthday Sunday. (Imperial Household Agency of Japan via AP)

In this photo provided by the Imperial Household Agency of Japan, its Emperor Emeritus Akihito and Empress Emerita Michiko pose for a photograph at their residence in Tokyo, Japan, Friday, Oct. 4, 2024, ahead of Michiko's 90th birthday Sunday. (Imperial Household Agency of Japan via AP)

In this photo provided by the Imperial Household Agency of Japan, its Emperor Emeritus Akihito and Empress Emerita Michiko pose for a photograph at their residence in Tokyo, Japan, Friday, Oct. 4, 2024, ahead of Michiko's 90th birthday Sunday. (Imperial Household Agency of Japan via AP)