01 / Miyauchibaru Canal
Under a small hill, tunnels were cutleft and right of a standing pillar.

The Miyauchibaru canal, drawn from Suitenbuchi in Saikoji, Hayato, was begun in the first year of Shotoku (1711) and finished in the sixth (1716). Its twin tunnels at Uchiyamada look like a pair of nostrils, hence the nickname Hanansu, "nose holes"; they are thought to have opened then. The city designates them a historic site.
- Begun 1711, finished 1716
- Twin tunnels, Hanansu
- 2005: city-designated historic site
