Showa Emperor's Daughter
Showa Emperor (Emperor Hirohito) had seven children.
The eldest child was Princess Teru (Shigeko) who was born in 1925.
The Princess married other member of the imperial noble clan in 1943 while the Empire of Japan was engaged in the war against the United States after the Pearl Harbor attack.
The father of her husband, Prince Morihiro Higashikuni, became the first and only member of the imperial family that became prime minister of Japan after the Empire of Japan surrendered to the US on August 15, 1945.
But as the headquarters of the the US military led by General MacArthur stationed in Tokyo instructed the Japanese Government to deprive most of members of the imperial family of their official titles and privileges, the Higashikuni family lost their imperial title.
So, in 1947, the eldest daughter of Showa Emperor became wife of a private citizen Morihiro Higashikuni. They were also imposed heavy tax on. So, they lost their big assets. Shigeko Higashikuni started to earn money by selling eggs and handling some plastic goods.
But she died in 1961 due to cancer. It is said that this tragedy gave a great shock to her parents, the emperor who later awfully demised in 1989 and the empress in 2000.
So, incumbent Emperor of Japan has lived 52 years longer than his elder sister.
Incidentally, the imperial family of Japan has no surname or family name, since it is not expected that other family takes over the incumbent imperial family. There has been only one imperial family in Japan since foundation of the nation. And there must be the only one.
In China, it was a usual practice that one dynasty was defeated by other strong family who became the next imperial family in its history over 3000 years. So, Chinese imperial families had family names.
Finally reigning Emperor is the fifth children and also the eldest son between Showa Emperor and Empress.
And of course a daughter of the emperor becomes a private citizen when she marries a private man by law today.
*** *** *** ***
Mar 6:17 For Herod himself had sent forth and laid hold upon John, and bound him in prison for Herodias' sake, his brother Philip's wife: for he had married her.