Ukai of Nagara-gawa River is the sole ukai in Japan that is patronized by the Imperial Court, and the official job title of usho (a fisherman of cormorant fishing) of Nagara-gawa ukai is shikibushoku usho of Kunaicho (Imperial Household Agency).
長良川における鵜飼は日本で唯一皇室御用の鵜飼であり、長良川の鵜匠は職名を宮内庁式部職鵜匠という。