 This is also the largest display of cormorant fishing in all of Japan, with six fishing masters going down the river at the same time, using their birds to catch "ayu" sweetfish.The season lasts from May 11 to October 15 every year and occurs each night, except during high water levels and the harvest moon.Matsuo Bashō, a renowned haiku poet in the Edo period, spent many months in Gifu, creating "haiku" about many things, including cormorant fishing.