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Ukka (鱁鮧, Junka) is the salted fish of ayu. As types, there are ovarian babies, bitterness to make with internal organs, white testis of testicles, cutting with body. It is a specialty product of the area where sweetfish is caught, such as Nagara River in Gifu Prefecture, Tamagawa River in Kumamoto Prefecture, Takatsu River in Shimane Prefecture, Ono River in Oita Prefecture, etc. are known. Also in the mountainous areas such as Nakatsugawa-shi, Gifu prefecture, there was a thing called "Tsugumi Uruka" using the internal organs of the bird's head. ...