Tancho has only one red, round pattern on its head, and was named Tancho after the bird Tancho crane. The word “Tancho” generally means Tancho-kohaku and is popular because the red circle pattern on the white body is reminiscent of the Japanese flag. There are many varieties of Tancho, including Tancho-sanshoku, Tancho-showa, and Tancho-goshiki. If the head has a round pattern but the body has a pattern, it does not belong to the Tancho family and is called Maruten or Komaruten.
In Tancho, the red pattern should be close to a perfect circle and located in the center of the head. The size of the red pattern should be neither too large nor too small, but just enough to fit between the two eyes.