| Tōmaru | |
| Country: | Japan |
| Maleweight: | 3.3 kg |
| Femaleweight: | 2.1 kg |
| Colour: | black |
| Apa: | no |
| Ee: | yes |
| Pcgb: | yes |
| Type: | Chicken |
| Latin: | Gallus gallus domesticus |
The Tōmaru (Japanese: 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.
The Tōmaru is thought to have originated in China at the time of the Tang dynasty; the kanji character Japanese: 唐, 'tou', represents that dynasty.
The Tomaru was registered as a Japanese natural monument of Niigata Prefecture in 1939.
The Tōmaru has only one colour, black with a greenish sheen. 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. The feet and shanks are dark slate-grey. The comb is single. The ears and face are red, sometimes with dark markings; in hens the face may be entirely black.