The 72nd Emperor of Japan, Emperor Shirakawa, is one of the most controversial emperors in history, his real name is "Sadahito", and he is the son of Emperor Gosanjo. The era of Emperor Shirakawa's reign was at the end of the Heian period, which was the era of the decline of the Fujiwara Regent family and the prosperity of the imperial court. Friends who are familiar with Japanese history know that the Fujiwara family once monopolized Japan's political power as a foreign relative plus regent and Sekihaku, and became the de facto king of Japan at that time. In order to resist the arbitrariness of the Fujiwara family, Emperor Shirakawa's father, Emperor Gosanjo, voluntarily abdicated and became the emperor (called "the emperor" after the emperor's abdication), ruling as the emperor, setting aside the old bureaucratic system headed by Sekihaku (equivalent to the prime minister) of the imperial court, and politically emptying the Fujiwara family; Economically, Emperor Gosanjo passed the manor reorganization order, taking advantage of the antipathy of local nobles and samurai to the Fujiwara family, and assigned a large area of the Fujiwara family manor to the emperor. After a double blow of political and economic blows, the power of Japan gradually returned from the Fujiwara family to the Imperial Family, with the Emperor as the center. After the death of Emperor Gosanjo, his son, Emperor Shirakawa, followed his example and abdicated as Emperor Taishang, and was called "Emperor Shirakawa". And because Emperor Shirakawa later became a monk, he was also called "Emperor Shirakawa" (the emperor after becoming a monk was called "Emperor Fa").

Emperor Shirakawa, who inherited the rich inheritance of his father's Gosanjo Emperor, has power and covers the sky with only one hand. Not only did he use his son, Emperor Horikawa, as a puppet, but even after his grandson, Emperor Toba, succeeded to the throne, Emperor Shirakawa remained in power as the supreme ruler of Japan. It is said that Emperor Shirakawa once boasted that everything else in the world is under control, except for the water of the Kamo River, the gambling game of Double Six and the mountain mage, everything else is under control!

In 1117 A.D., Emperor Shirakawa married his adopted daughter Fujiwara Akiko, the daughter of the Great Nayan Fujiwara Kitomi, to his grandson, Emperor Toba. Originally, it was not a big deal for the grandfather to marry his adopted daughter to his own grandson, although it was an aunt and nephew in name, but there was no blood relationship. However, the relationship between Emperor Shirakawa and Zhangzi, the adoptive father and daughter, is very unusual. According to the records of Japan's wild history, Fujiwara Zhangzi was brought into the palace by Shirakawa when she was very young, and she was deeply favored by Shirakawa, and was often held in Shirakawa's arms. As Zhangzi grew older, the unusual relationship between the adoptive father and daughter gradually spread in the palace. It is said that Emperor Toba at that time also heard that a large green hat was worn by his own father, and the young Emperor Toba dared to be angry and did not dare to speak, and in the shadow of the powerful Emperor Shirakawa, he had to silently accept this woman who did not know whether it was his grandmother or wife to become his middle palace (equivalent to the queen-to-be).

Regarding the sex scandal between Emperor Shirakawa and Zhangzi, even after Zhangzi became Emperor Toba's middle palace, Emperor Shirakawa still maintained an intimate sexual relationship with Zhangzi as his granddaughter-in-law. Even the eldest son of Emperor Toba and Zhangzi, Prince Kenhito (later Emperor Shotoku), was suspected to be the son of Emperor Shirakawa. If this is the case, Emperor Toba, as the "father", should instead call his "son" Prince Hidehito (later Emperor Shotoku) his "uncle...... Emperor Toba, who had been wearing an emerald green hat for 12 years, had finally waited for the day to turn over. In 1129 AD, Emperor Shirakawa fell ill and died, and Emperor Toba, who had been his grandson for 12 years (in fact, Toba was indeed Shirakawa's grandson), finally became a famous and real emperor. Royalist (royalist?) Emperor Toba, who has the highest power in the political and military forces, has finally launched a revenge program against his grandfather.

First, Toba overturned some of the policies of the Shirakawa era and reused ministers who were discouraged or alienated during the Shirakawa era. Then he alienated the middle palace lady Zhangzi, who had an ambiguous relationship with Shirakawa, and even the children born to Zhangzi were alienated by Emperor Toba. Emperor Shotoku, the eldest son of Toba and Zhangko, was ostracized immediately after the death of Emperor Shirakawa, who did not know whether it was the prince or his father, and was later replaced by Emperor Konoe, who was born to Emperor Toba and other favorite concubines, and became a puppet emperor without any real power like Toba in the Shirakawa period, and was the only virtual emperor who did not practice imperial government in that era. In addition, the other two princes born to Zhangzi, Prince Tongren and Prince Junren, all died mysteriously before the age of 10. The other surviving prince, Prince Masahito, was also deliberately cultivated by Toba to become a "pit gate" - the second ancestor who could not hear (Wen) or dance (Wu). This shows how much Toba hates the son born to Zhangzi, who is suspected of having an adulterous affair with Shirakawa.

Toba's liquidation of Shirakawa doesn't stop there. For the hatred of a snow cuckold, Toba also married Yasuko Fujiwara, a concubine of Shirakawa during his lifetime, as the queen - you get my wife, and Lao Tzu also gets your wife back. If the adultery between Emperor Shirakawa and Zhangzi is just a story of wild history or the plot of a TV series, then Toba's marriage to Shirakawa's concubine Taizi as the queen is an accurate historical record. Why does the grandson have to marry his grandfather's wife? Why did Toba alienate Zhangzi and his children after taking real power? These historical facts are not difficult to reminisce, and the adultery between Emperor Shirakawa and Zhangzi is not just wild history. Toba's revenge on Zhangzi and her children after 12 years as a cuckold is easy to understand.

An era of totalitarianism will inevitably produce dictators who are empty-sighted. A dictator in a totalitarian era feels that he is omnipotent, that he has no scruples, that he has nothing to fear, even if he violates common ethics. It was in this historical context that the absurdity of grandfathers and grandsons cuckolding each other appeared in the Japanese imperial family.