Gifu, Aichi and Mie, these three prefectures had suffered from floods countless times since old days. Therefore, bakufu made Satsuma Domain to fix the problem of Kiso sansen rivers.
It took 2 years to finish the construction, and also 85 people died through the construction.
Even though this hard construction got done, because of over budget plan and having so many victims, Yukie Hirata who was in Satsuma Domain killed himself.
In Kaizo-ji temple, there are graves for 24 people including Yukie.

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