The Tokugawa shogunate's punitive flood-control order on Satsuma Domain caused 85 deaths, exposing deliberate administrative cruelty toward a rival domain.
Key Facts
- Satsuma samurai seppuku
- 51
- Deaths from disease
- 33
- Karō who committed seppuku
- Hirata Yukie
- Era
- Hōreki era, Tokugawa shogunate
- Project completion
- Meiji period
- Rivers involved
- Kiso, Nagara, and Ibi Rivers
Location
Cause → Event → Consequence
The Tokugawa shogunate ordered Satsuma Domain to undertake extensive and technically demanding flood control works in Mino Province, near its border with Owari Province. Shogunal authorities are recorded as having intentionally obstructed the project, increasing the burden on Satsuma personnel. This order was widely regarded as a means of financially and politically weakening the domain.
Satsuma samurai and officials carried out the flood control project on the Kiso, Nagara, and Ibi Rivers near Nagoya during the Hōreki era. Due to the extreme difficulty of the works and deliberate interference by shogunal overseers, 51 samurai committed seppuku, 33 died of disease, and the responsible karō, Hirata Yukie, also took his own life.
The river improvement project was not completed until the Meiji period, long after the original incident. The event became a symbol of Tokugawa oppression toward outside domains and contributed to lasting anti-shogunate sentiment in Satsuma, a domain that would later play a central role in the Meiji Restoration.