Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, arrives with her husband Kei from Tokyo to start their new life in the U.S. at JFK International airport in New York, U.S., November 14, 2021.REUTERS/Shannon Stapleton 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, arrives with her husband Kei from Tokyo to start their new life in the U.S. at JFK International airport in New York, U.S., November 14, 2021.REUTERS/Shannon Stapleton 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, arrives with her husband Kei from Tokyo to start their new life in the U.S. at JFK International airport in New York, U.S., November 14, 2021.REUTERS/Shannon Stapleton TPX IMAGES OF THE DAY 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, arrives with her husband Kei from Tokyo to start their new life in the U.S. at JFK International airport in New York, U.S., November 14, 2021.REUTERS/Shannon Stapleton 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, arrives with her husband Kei from Tokyo to start their new life in the U.S. at JFK International airport in New York, U.S., November 14, 2021.REUTERS/Shannon Stapleton 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

People wave as the ANA flight carrying Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei to New York to start their new life in the U.S. leaves its gate at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

The ANA flight carrying Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei to New York to start their new life in the U.S. is pictured at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato TPX IMAGES OF THE DAY 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, is seen before she and her newly married husband Kei board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, is checked in before she and her newly married husband Kei they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei are checked in before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei are pictured before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei are checked in before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei arrive before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei check in before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei arrive before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei arrive before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei are seen before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, is seen before she and her newly married husband Kei before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato TPX IMAGES OF THE DAY 

Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei arrive before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Members of the media wait for Mako Komuro, former Japan's Princess Mako and the eldest daughter of Crown Prince Akishino and Crown Princess Kiko, and her newly married husband Kei before they board a flight bound for New York to start their new life in the U.S. at Haneda airport in Tokyo, Japan November 14, 2021. REUTERS/Issei Kato 

Photographers take photos of a woman watching a live broadcast of the news conference by Japan's Princess Mako and her husband Kei Komuro on a smartphone, outside a hotel where the news conferred is being held in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

A man watches a live broadcast of the news conference by Japan's Princess Mako and her husband Kei Komuro on a smartphone, outside a hotel where the news conferred is being held in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Japan's Princess Mako and her husband Kei Komuro attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro bow to audience before a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan on October 26, 2021.Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro arrive for a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako (not seen) and her husband Kei Komuro attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro (not seen) attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro bow after a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro attend a news conference to announce their marriage registration at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro deliver a speech during a news conference to announce their wedding at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Japan's Princess Mako and her husband Kei Komuro attend a news conference to announce their wedding at Grand Arc Hotel in Tokyo, Japan, October 26, 2021. Nicolas Datiche/Pool via REUTERS 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021.REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. The Chinese character reads, 'loyalty'. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. The slogan in the read reads, 'Bring back an imperial family where we can love and respect' REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021.REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Protesters hold banners during a march against the marriage between Japan's Princess Mako and her fiance Kei Komuro in Tokyo, Japan, October 26, 2021. REUTERS/Kim Kyung-Hoon 

Japan's Emperor Naruhito, Empress Masako, Crown Prince Akishino, Crown Princess Kiko and Princess Mako attend a public appearance for New Year celebrations at the Imperial Palace in Tokyo, Japan, January 2, 2020. REUTERS/Kim Kyung-Hoon 

Japan's Princess Mako attends the enthronement ceremony of Japan's Emperor Naruhito at the Imperial Palace in Tokyo, Japan October 22, 2019. Kazuhiro Nogi/Pool via REUTERS 

Japan's Princess Kako and Princess Mako arrive for a ceremony to proclaim Emperor Naruhito's enthronement to the world, called Sokuirei-Seiden-no-gi, at the Imperial Palace in Tokyo, Japan October 22, 2019. REUTERS/Issei Kato/Pool 

Japan's Princess Mako arrives at the ceremony site where Emperor Naruhito will report the conduct of the enthronement ceremony at the Imperial Sanctuary inside the Imperial Palace in Tokyo, Japan October 22, 2019. REUTERS/Kim Hong-ji 

Japan's Princess Mako is seen at the National Museum of Ethnography and Folklore in La Paz, Bolivia, July 16, 2019. REUTERS/David Mercado 

Japan's Princess Mako is seen at the National Museum of Ethnography and Folklore in La Paz, Bolivia, July 16, 2019. REUTERS/David Mercado 

Japan's Princess Mako meets with members of Japanese community in La Paz, Bolivia, July 16, 2019. REUTERS/David Mercado 

Members of Japanese community wait to meet Japan's Princess Mako in La Paz, Bolivia, July 16, 2019. REUTERS/David Mercado 

Japan's Princess Mako meets with members of Japanese community in La Paz, Bolivia, July 16, 2019. REUTERS/David Mercado 

Japan's Princess Mako and La Paz Mayor Luis Revilla wave after a ceremony in La Paz, Bolivia, July 15, 2019. REUTERS/David Mercado 

Japan's Princess Mako speaks during a ceremony at the town hall in La Paz, Bolivia, July 15, 2019. REUTERS/David Mercado