
Gifu University's professors Morihiro Harada (right) and Shigeya Nagayama collect water to analyze the environmental DNA of ayu river fish from the Nagara River in Mino, Seiki, Japan.

Cormorant fishing master, known as usho, Youichiro Adachi (left), holds the leashes tied to the necks and bodies of cormorants as he prepares for cormorant fishing or ukai, on the Nagara River in Oze, Seki, Japan.

Cormorant fishing master feeds a cormorant with a fish after cormorant fishing, known as ukai, at home in Oze, Seki, Japan

A waitress carries grilled ayu river fish from the Nagara River caught by cormorant fishing, known as ukai, the previous night for Ryokan Sugiyama customers in Gifu, Japan

Cormorant fishing master strokes his bird's neck during a daily physical check-up to confirm its health and maintain their bond, at home in Oze, Seki, Japan