01 / Nakama Karato, Horikawa Canal
Work on the Horikawa stopped at Nagamasa's death,and resumed only 130 years later.

Completed in 1762 (Horeki 12) as the intake gate from the Onga River, the karato (sluice gate) regulated the water by the number of long, thin planks set into its groove. The Horikawa canal was begun in 1621 (Genna 7) on the order of Kuroda Nagamasa, but work stopped with his death. Beside the Karato Community Hall stand two camphor trees designated city natural monuments.
- Completed in 1762 (Horeki 12) (city)
- Prefectural historic site "Horikawa" (former name: the Nakama Karato sluice gate)
- The Karato camphor trees are 22 m tall and about 250 to 300 years old (city)
