Last weekend, I went to the PUK campus festival on Saturday, and then went with my family to
Toyo on Sunday.
Toyo is now part administratively of Yatsushiro City, but geographically I think it's closer to Gokanosho. It's famous mainly for two things: its ginger production and its stone masonry. I heard that some of the pioneers of stone bridge-building techniques in Japan came from this area, and Oita, Nagasaki, and Kumamoto have the largest number of stone bridges in Japan. There's a museum in Toyo devoted to stone bridges. There's lots of information there about the history of stone bridges, and some interesting practical activities, for example lifting very big stones through the use of pullies and so on, and even building a bridge on a wooden frame, and then removing the frame after adding the last stone, to see whether your bridge is strong enough to stand on its own.