Meaning
煮頃鮒 (にごろぶな, Nigorobuna) is Nigorobuna, a Japanese food (water animals).
What is Nigorobuna?
Nigoro-buna ( Carassius auratus grandoculis ), sometimes called round crucian carp, is a species of wild goldfish endemic to Japan. Its habitat is limited to Lake Biwa, its tributaries and distributaries, and irrigation canals in the Shiga Prefecture. This is a highly prized fish commercially, made into funazushi , for which whole fish are salted and fermented in beds of cooked rice. An authentic funazushi traditionally must use nigorobuna , and for this reason, it has be dubbed " sushi-buna ", meaning "the crucian carp for sushi". The dish, a type of narezushi , is a local delicacy of Shiga Prefecture, and is known for its pungent odor. This species is said to make superior funazushi that is tender down to the bones, in contrast to imitations made by using gengoro-buna as a substitute. The ginbuna is also said to be used as a substitute.