Japan's imperial system is the longest monarchy in the history of the world, after the Meiji Restoration in the 19th century, it was proclaimed "ten thousand generations" and written into the constitution, the Chrysanthemum Dynasty is also the only dynasty in Japan, the implementation of the imperial hereditary system, and the emperor and his imperial family are not allowed to adopt adopted children.
Note: The earliest written record of the name of the Japanese emperor is the Asuka Pure Gohara Order promulgated by Japan in 689.
In the history of Japan, there have also been 8 female emperors, namely Emperor Tuiko, Emperor Reiki, Emperor Shōgun, Emperor Motoaki, Emperor Motosho, Emperor Takaaki, Emperor Akira, and Emperor Go-Sakuracho, but the first rule in Japan's existing "Imperial Family Model" states: "Only male descendants of the imperial family can inherit the throne." ”
However, because the Japanese imperial family attaches great importance to the issue of blood, so the wife of the Japanese emperor is basically from the imperial family, it is well known that the harm of the marriage of close relatives, the Japanese emperor has been passed down for more than 100 generations (from the myth and legend of Emperor Shenmu to Emperor Reiwa a total of 126 generations), the impact of the marriage of close relatives has been quite obvious.
Emperor Meiji of Japan had 6 sons, and as a result, 5 sons died prematurely, only Emperor Taisho survived, Emperor Taisho was the first emperor in modern Japan to practice monogamy, but Emperor Taisho's health was very bad from childhood, and he later suffered from mental illness, but all four sons of Emperor Taisho survived.
In 1926, Emperor Taisho abdicated due to illness, and his son Hirohito became the new emperor of Japan, Emperor Showa, who had only two sons.
But to the reassurance of the Japanese Imperial Family, Emperor Showa lived a long life, his two sons grew up safely, and his eldest son successfully succeeded him to the throne, that is, Emperor Akihito, and Emperor Akihito's wife, Michiko Shoda, was the first civilian empress in Japanese history.
In April 1958, after the marriage between Akihito (then crown prince) and Michiko was officially proposed, it caused a lot of opposition, in fact, Michiko was not a commoner, her father Hidesaburo Shoda was a well-known industrialist and the founder of the Nissin Milling Company, but for the Japanese imperial family and the public, Michiko did not belong to the Japanese imperial family, then it was a commoner.
Later, Emperor Showa spoke up: "As long as the crown prince likes it, it doesn't matter if he is born a commoner." Akihito successfully married Michiko, and after marriage, she had two sons, the eldest son officially ascended the throne in 2019, that is, Emperor Naruhito, Emperor Naruhito's wife Masako came from a family of diplomats in Japan, and was the second commoner to join the Japanese imperial family after Michiko, but Masako's married life was not good, and she did not "feel sorry for each other" with her mother-in-law Michiko.
Masako did not have her own telephone number, could not go out freely, and because of the delay in giving birth, she faced the pressure of having a child, and it was not until the ninth year of marriage (2001) that she gave birth to a daughter, and after giving birth to her daughter, Masako was also approved to return to her mother's house for the first time, but the daughter had no inheritance rights.
Therefore, the head of the imperial household office publicly said: "The people are looking forward to the crown princess to have a second child." He also hoped that the crown prince's sister-in-law, Noriko, the wife of Emperor Naruhito's younger brother Fumihito, would have a third child, and Noriko was the first middle-class woman to join the Japanese imperial family, after Which kiko had two daughters.
In 2006, Noriko gave birth to a son named Yujin, but Masako was diagnosed with an indication disorder two years earlier and never had another child.
Due to the problem of heirs, after Emperor Naruhito ascended the throne, the order of succession to the throne changed accordingly, with the first being Fumihito, the second being Yujin, and the third being Akihito's younger brother Masahito, but Masahito had no children, so the father and son of Fumihito and Yuhito were attracted much attention in Japan.
In order to prevent the occurrence of various accidents, Fumihito and Yuren have always taken separate planes, if one of them dies in an accident, at least one person can inherit the throne, the Japanese emperor system will not end here, and because of the guarantee of blood continuity, Fumihito and Youren can not enjoy the fun between father and son with ordinary people, and need to bear the responsibility of heir.