The Tōmaru (唐丸) is a Japanese breed of long-crowing chicken. The crow may be sustained for some 25 seconds. It is one of four Japanese long-crowing breeds, the others being the Koeyoshi, the Kurokashiwa and the Tōtenkō.[5]: 344 [6]: 332
The Tōmaru has only one colour, black with a greenish sheen.[5]: 344 The body is broad and compact with a full breast. The tail is held low, but higher than horizontally; although the sickle feathers may be long enough to touch the ground, this is not usually considered a long-tailed breed.[7] The feet and shanks are dark slate-grey.[7] The comb is single. The ears and face are red, sometimes with dark markings; in hens the face may be entirely black.[5]: 344
These are the chicken breeds considered in Japan to be wholly or partly of Japanese origin. Inclusion here does not necessarily imply that a breed is predominantly or exclusively Japanese.