Showa-sanshoku is characterized by having a continuous shape of “Utsurizumi” derived from the black background, and it was named Showa-sanshoku because it was produced at the beginning of the Showa period in the history of Japan.
For Showa-sanshoku, it is said that the one with the ink-colored pattern that rolls up from the belly to the back and the ink-colored pattern that splits the face in half is good.
Showa-sanshoku tends to have headband-shaped ink patterns on its head, and the base of the pectoral fins is characterized by being blackened.

JAS No.2003 Showa-sanshoku
Showa-sanshoku has a black body (black background), and there are scarlet and white imprints across the body. In general, the base of the pectoral fin is on a black background, but in the process of growth, there are some that change from a white background to a black background. There are also individuals with a continuous black background that does not have a mottled shape called "utsuri-zumi" in Japanese.