Ayu zosui, a local dish from Gifu Prefecture, features grilled ayu fish cooked until crispy and served in a flavorful broth with rice.
It is said to have gained popularity as a way to enjoy ayu that had been damaged during harvesting. In Gifu Prefecture, known for its clear rivers such as the Kiso, Nagara, and Ibi Rivers, ayu fishing is active from June to October. Traditional fishing sites called yana are located near major rivers, where visitors can try fishing and enjoy freshly caught ayu at nearby restaurants.

Typically served at the end of an ayu meal, ayu zosui allows diners to fully appreciate the umami of the fish and the dashi.