|At Inokashira Park Zoo, Tokyo|
|Japanese badger range|
The Japanese badger (Meles anakuma) is a species of carnivoran of the family Mustelidae, the weasels and their kin. Endemic to Japan, it is found on Honshu, Kyushu, Shikoku, and Shōdoshima. It shares the genus Meles with its close relatives, the European (M. meles) and Asian (M. leucurus) badgers. In Japan it is called by the name anaguma (穴熊) meaning "hole-bear", or mujina (むじな, 狢).
Japanese badgers are generally smaller (average length 79 cm (31 in) in males, 72 cm (28 in) in females) and less sexually dimorphic (except in the size of the canine teeth) than their European counterparts. Tail length is between 14 and 20 cm (5.5 and 7.9 in). This species is similar or mildly larger than the Asian badger. Adults usually weigh from 3.8 to 11 kg (8.4 to 24.3 lb). The average weight of female Japanese badgers in one study from the Tokyo area was found to be 6.6 kg (15 lb) while that of males was 7.76 kg (17.1 lb). In the Yamaguchi Prefecture, the average spring weight of female and male Japanese badgers was 4.4 kg (9.7 lb) and 5.7 kg (13 lb). The torso is blunt and limbs are short. The front feet are equipped with powerful digging claws. The claws on hind feet are smaller. The upper coat has long gray-brown hair. Ventral hair is short and black. The face has characteristic black-white stripes that are not as distinct as in the European badger. The dark color is concentrated around the eyes. The skull is smaller than in the European badger.
The absence of badgers from Hokkaido, and the presence of related M. leucurus in Korea, suggest that the ancestral badgers reached Japan from the southwest via Korea. Genetic studies indicate that there are substantial differences between Japanese and Asian badgers, which were formerly considered conspecific, and that the Japanese badgers are genetically more homogenous.
Like other members of Meles, Japanese badgers are nocturnal and hibernate during the coldest months of the year. Beginning at 2 years of age, females mate and give birth to litters of two or three cubs in the spring (March–April). They mate again shortly afterwards, but delay implantation until the following February. Japanese badgers are more solitary than European badgers; they do not aggregate into social clans, and mates do not form pair bonds. During mating season, the range of a male badger overlaps with those of 2 to 3 females. Badgers with overlapping ranges may communicate by scent marking.
These badgers are found in a variety of woodland and forest habitats.
Although it remains common, the range of M. anakuma has shrunk recently. Covering an estimated 29 per cent of the country in 2003, the area had decreased 7 per cent over the previous 25 years. Increased land development and agriculture, as well as competition from introduced raccoons are threats. Hunting is legal but has declined sharply since the 1970s.
In 2017, concern was raised by an upsurge in badger culling in Kyushu. Apparently encouraged by local government bounties and increased popularity of badger meat in Japanese restaurants, it is feared the culling may have reached an unsustainable level.
- Mujina, a badger creature from Japanese folklore
- Blakiston's Line, the faunal boundary line drawn between Hokkaidō in the north and Honshū, south of it, while certain animal species can only be found north of the line, certain other species can only be found south of it.
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- Kaneko, Y., Maruyama, N. and Kanzaki, N. 1996. Growth and seasonal changes in body weight and size of Japanese badger in Hinodecho, suburb of Tokyo. Journal of Wildlife Research 1: 42-46.
- Tanaka, H. (2006). Winter hibernation and body temperature fluctuation in the Japanese badger, Meles meles anakuma. Zoological science, 23(11), 991-997.
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- Hornyak, T. (2017-06-09). "Ecologists warn of Japanese badger cull 'crisis'". Nature. doi:10.1038/nature.2017.22131.
- Kaneko, Y.i; Buesching, C. D.; Newman, C. (2017-04-13). "Japan: Unjustified killing of badgers in Kyushu". Nature. 544 (7649): 161. Bibcode:2017Natur.544..161K. doi:10.1038/544161a. PMID 28406210.