Culture

September 5 — A Glimpse into Japanese History

September 4, 2026

On September 5, 1158, Emperor Go-Shirakawa abdicated and began ruling as a cloistered emperor. On the same day in 1595, 39 people related to Toyotomi Hidetsugu were executed in Kyoto. These events mark significant political transformations in medieval and Sengoku Japan.

1158: Emperor Go-Shirakawa Begins Cloistered Rule In 1158 (the 3rd year of Hōgen), Emperor Go-Shirakawa abdicated in favor of his son, Prince Morihito (Emperor Nijō), becoming a cloistered emperor, or "Insei." Although no longer emperor, Go-Shirakawa retained real political power through this system, which influenced Japanese politics from the late Heian period into the Kamakura era. For foreign residents in Japan, understanding the concept of the cloistered emperor helps explain how retired emperors could continue to influence politics behind the scenes.

1595: Execution of Toyotomi Hidetsugu's Associates In 1595 (Bunroku 4), 39 people linked to Toyotomi Hidetsugu, including his lawful wife, concubines, and children, were executed at Sanjō Kawara in Kyoto. Hidetsugu was the nephew of Toyotomi Hideyoshi, and this event reflected internal power struggles within the Toyotomi clan during the volatile Sengoku period. Those interested in Japanese history can see how political rivalries often resulted in harsh and violent outcomes during this era.