Yellowtail is a temperate fish, and its juveniles are called "mojako" throughout Japan. They are produced in the East China Sea and the coastal areas of Kitakyushu, Japan, and grow up in this migration, repeatedly going north and south between the spawning grounds and the feeding grounds of Hokkaido. The fish body is a beautiful spinning hammer shape, with a blue back and a silvery white belly, and a yellow belt running from the eyes to the tail. It can be more than 80 cm in length in 4 to 5 years, making it a large edible fish.

Yellowtail grows quickly, reaching 30 cm in one year, 50 cm in two years, 60 cm in three years, and 70-80 cm in four to five years. They begin long-distance migrations in the third year, heading north along the coast of the Japanese archipelago in spring and summer, and south in autumn and winter to prepare for spawning in order to find food and comfortable water temperatures (16-17 degrees). Yellowtail is also "a fish found only in the waters of Japan" (*1). Yellowtail, along with the greater yellowtail and yellowtail, which are also members of the yellowtail family, are listed as the top three most delicious yellowtail species.