Japan's Emperor Naruhito with Empress Masako, second right, their daughter Princess Aiko, right, Crown Prince Akishino, third left, Crown Princess Kiko, second left, and their daughter Princess Kako, left, as they appear on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito accompanied with Empress Masako wave well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

People holding flags enter the Imperial Palace to congratulate Emperor Naruhito of Japan on his birthday on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Emperor Naruhito of Japan delivers his message, expressing his wishes during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Emperor Naruhito of Japan delivers his message, expressing his wishes during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Emperor Naruhito of Japan delivers his message, expressing his wishes during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Well-wishers cheer Japan's Emperor Naruhito as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

(L to R) Emperor Naruhito of Japan and his wife Empress Masako greet visitors during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Japan's Emperor Naruhito, accompanied by Empress Masako, waves to the well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, accompanied by Empress Masako and their daughter Princess Aiko, greets well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, accompanied by Empress Masako and their daughter Princess Aiko, waves towards the well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito's daughter Princess Aiko waves to the well-wishers as she appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito accompanied with Empress Masako wave well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito waves well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

People enter the Imperial Palace to congratulate Emperor Naruhito of Japan on his birthday on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: Japan's Emperor Naruhito (L) and Empress Masako greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: Japan's Emperor Naruhito (L) and Empress Masako greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: Japan's Emperor Naruhito (L) and Empress Masako greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

People enter the Imperial Palace to congratulate Emperor Naruhito of Japan on his birthday on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Security guard monitors people during the Emperor of Japan Naruhito's birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

People enter the Imperial Palace to congratulate Emperor Naruhito of Japan on his birthday on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: (From R) Japanese Crown Prince Fumihito, Crown Princess Kiko and Princess Kako greet the public on Emperor Naruhito's birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: (L-R) Japan's Princess Aiko greets the public on Emperor Naruhito's birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: (L-R) Japanese Emperor Naruhito, Empress Masako and their daughter Princess Aiko greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: (L-R) Japanese Emperor Naruhito (Center L), Empress Masako (Center R) and their children greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: Japan's Emperor Naruhito (L) and Empress Masako greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS REFILE - QUALITY REPEAT 

TOKYO, JAPAN - FEBRUARY 23: Members of the public gather for Japan's Emperor Naruhito (unseen) to greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

TOKYO, JAPAN - FEBRUARY 23: Members of the public gather for Japan's Emperor Naruhito (unseen) to greet the public on his birthday on February 23, 2023 in Tokyo, Japan. Takashi Aoyama/Pool via REUTERS 

Well-wishers wait to see Japan's Emperor Naruhito as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Well-wishers wait to see Japan's Emperor Naruhito as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Well-wishers wait to see Japan's Emperor Naruhito as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

(C to C-R) Emperor Naruhito of Japan and his wife Empress Masako greet visitors during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

(C to C-R) Emperor Naruhito of Japan and his wife Empress Masako greet visitors during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

(C to C-R) Emperor Naruhito of Japan and his wife Empress Masako greet visitors during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Well-wishers are escorted to see the Japan's Emperor Naruhito at the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Well-wishers cheer as they see Japan's Emperor Naruhito appear on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Well-wishers are escorted to see Japan's Emperor Naruhito as he appears on the balcony of the Imperial Palace to mark the emperor's 63rd birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito delivers a speech as Empress Masako, second right, their daughter Princess Aiko, right, Crown Prince Akishino, third left, Crown Princess Kiko, second left, and their daughter Princess Kako, left, appear on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, accompanied by Empress Masako and their daughter Princess Aiko, delivers a speech to well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, accompanied by Empress Masako and their daughter Princess Aiko, greets well-wishers as they appear on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, left, accompanied by Empress Masako, waves to well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, left, accompanied by Empress Masako, waves to well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito waves to well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

Japan's Emperor Naruhito, left, accompanied by Empress Masako, waves well-wishers as he appears on the balcony of the Imperial Palace to mark the emperor's 63th birthday in Tokyo Thursday, Feb. 23, 2023, in Tokyo. Eugene Hoshiko/Pool via REUTERS 

(L) Emperor Naruhito of Japan delivers his message, expressing his wishes during his birthday celebration, alongside Empress Masako, at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito's birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

(L to R) Emperor Naruhito of Japan and his wife Empress Masako greet visitors during his birthday celebration at the Imperial Palace on February 23, 2023, Tokyo, Japan. People gathered to celebrate Naruhito’s birthday at the Imperial Palace. Rodrigo Reyes Marin/Pool via REUTERS 

Japan's Emperor Naruhito greets people during his birthday celebration at the Imperial Palace in Tokyo, Japan, February 23, 2023.Rodrigo Reyes Marin/Pool via REUTERS 

Japan's Emperor Naruhito, Empress Masako attend the Imperial Guard New Year Review at the Imperial Palace Friday, Jan. 20, 2023, in Tokyo. Eugene Hoshiko/AP/Pool via REUTERS 

Japan's Emperor Naruhito, Empress Masako are escorted to attend the Imperial Guard New Year Review at the Imperial Palace Friday, Jan. 20, 2023, in Tokyo, Japan. Eugene Hoshiko/AP/Pool via REUTERS 

Japan's Emperor Naruhito, Empress Masako are escorted to attend the Imperial Guard New Year Review at the Imperial Palace Friday, Jan. 20, 2023, in Tokyo. Eugene Hoshiko/AP/Pool via REUTERS 

Japan's imperial family members: Former Empress Michiko, former Emperor Akihito, Emperor Naruhito, Empress Masako and Princess Aiko waves to well-wishers for the New Year's greetings at the Imperial Palace in Tokyo on January 2, 2023, for the first time in three years. YOSHIKAZU TSUNO/Pool via REUTERS 

Japan's imperial family members: Former Empress Michiko, former Emperor Akihito, Emperor Naruhito, Empress Masako, Princess Aiko, Crown Prince Akishino, Crown Princess Kiko and Princess Kako waves to well-wishers for the New Year's greetings at the Imperial Palace in Tokyo on January 2, 2023, the first time in three years. YOSHIKAZU TSUNO/Pool via REUTERS 

Japan's imperial family members, former Empress Michiko, former Emperor Akihito, Emperor Naruhito, Empress Masako, Princess Aiko, Crown Prince Akishino and Crown Princess Kiko waves to well-wishers for the New Year's greetings at the Imperial Palace in Tokyo on January 2, 2023, the first time in three years. YOSHIKAZU TSUNO/Pool via REUTERS 

Japan's Emperor Naruhito and former emperor Emeritus Akihito, attend a public appearance at the Imperial Palace in Tokyo Monday, Jan, 2, 2023. Shuji Kajiyama/Pool via REUTERS 

Well-wishers wave flags during Japan's Emperor Naruhito's public appearance with his family at the Imperial Palace in Tokyo, Sunday, Jan. 2, 2023. Shuji Kajiyama/Pool via REUTERS 

Japan's Emperor Naruhito and Empress Masako and their daughter Princess Aiko wave to well-wishers through a bullet-proof glass from a balcony during their New Year's public appearance at the Imperial Palace in central Tokyo, Japan, 02 January 2023. It was Emperor Naruhito's first New Year's greetings to the public since 2020. FRANCK ROBICHON/Pool via REUTERS 

TOKYO, JAPAN - JANUARY 02: Emperor Emeritus Akihito, Empress Emerita Michiko, Emperor Naruhito and Empress Masako attend the New Year's appearance by the Japanese royal family at the Imperial Palace on January 2, 2023 in Tokyo, Japan. The event was held for the first time in three years, following a hiatus due to the coronavirus pandemic. Tomohiro Ohsumi/Pool via REUTERS 

TOKYO, JAPAN - JANUARY 02: Emperor Emeritus Akihito, Empress Emerita Michiko, Emperor Naruhito, Empress Masako, Crown Prince Fumihito of Akishino and Crown Princess Kiko of Akishino attend the New Year's appearance by the Japanese royal family at the Imperial Palace on January 2, 2023 in Tokyo, Japan. The event was held for the first time in three years, following a hiatus due to the coronavirus pandemic. Tomohiro Ohsumi/Pool via REUTERS 

TOKYO, JAPAN - JANUARY 02: Emperor Emeritus Akihito, Empress Emerita Michiko, Emperor Naruhito, Empress Masako, Princess Aiko, Crown Prince Fumihito of Akishino, Crown Princess Kiko of Akishino and Princess Kako of Akishino wave during the New Year's appearance by the Japanese royal family at the Imperial Palace on January 2, 2023 in Tokyo, Japan. The event was held for the first time in three years, following a hiatus due to the coronavirus pandemic. Tomohiro Ohsumi/Pool via REUTERS 

TOKYO, JAPAN - JANUARY 02: Princess Akiko of Mikasa, Princess Nobuko of Mikasa, Emperor Emeritus Akihito, Empress Emerita Michiko, Emperor Naruhito, Empress Masako, Princess Aiko, Crown Prince Fumihito of Akishino, Crown Princess Kiko of Akishino, Princess Kako of Akishino, Princess Hisako of Takamado and Princess Tsuguko of Takamado wave during the New Year's appearance by the Japanese royal family at the Imperial Palace on January 2, 2023 in Tokyo, Japan. The event was held for the first time in three years, following a hiatus due to the coronavirus pandemic. Tomohiro Ohsumi/Pool via REUTERS