The tragedy of the Kiso River system: the "Horeki River Improvement Incident" and the Satsuma loyalists and their elder retainer, Hirata Tsuneyuki, committing seppuku

April 14, 1754 (4th year of the Horeki era) was the day when the first casualty occurred in the Horeki Flood Control Incident. To sum it up in a few words, "The on-site staff of the Satsuma Domain, unable to bear the Shogunate's unreasonable demands psychologically, committed seppuku," but that was not the end of the story. Let's take a look at the process step by step.   Land where the Nagara, Kiso, and Ibi rivers are intricately intertwined T…