The Japanese black bear (''Ursus thibetanus japonicus'') is a subspecies of the

Asian black bear The Asian black bear (''Ursus thibetanus''), also known as the Asiatic black bear, moon bear and white-chested bear, is a medium-sized bear species native to Asia that is largely adapted to an arboreal lifestyle. It lives in the Himalayas, sout ...

that lives on two main islands of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

Honshu , historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island separ ...

and

Shikoku is the smallest of the four main islands of Japan. It is long and between wide. It has a population of 3.8 million (, 3.1%). It is south of Honshu and northeast of Kyushu. Shikoku's ancient names include ''Iyo-no-futana-shima'' (), '' ...

. There are an estimated 10,000 black bears in Japan. The population of black bears on Shikoku is endangered at less than 30 individuals and the last confirmed sighting of a bear on the island of

Kyushu is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surroun ...

was in 1987 making them likely extinct on the island prior to the 21st century. There is a high price on bear parts in the black market, which threatens all bear populations in Japan. This particular species of bear are typically smaller with males only reaching and females only weighing about . Their body length is about long.

Diet

Ursus thibetanus japonicus eating plants

These bears are typically

herbivorous A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthpart ...

, eating mainly grasses and herbs during the spring. During the summer, they switch to berries and nuts to feed themselves for their

hibernation Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It most ...

. The bear is able to get the berries and nuts by climbing trees and using their claws to grab the food. These animals can be

omnivorous An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutri ...

and eat other wild animals and livestock when there is a need.(Hazumi 1994) Typical prey species include

Japanese serow The : (''Capricornis crispus'') ( 羚羊) is a Japanese goat-antelope, an even-toed ungulate mammal. It is found in dense woodland in Japan, primarily in northern and central Honshu. The serow is seen as a national symbol of Japan, and is subj ...

wild boar The wild boar (''Sus scrofa''), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species is ...

, and

sika deer The sika deer (''Cervus nippon''), also known as the Northern spotted deer or the Japanese deer, is a species of deer native to much of East Asia and introduced to other parts of the world. Previously found from northern Vietnam in the south to ...

. Like other bears,

cannibalism Cannibalism is the act of consuming another individual of the same species as food. Cannibalism is a common ecological interaction in the animal kingdom and has been recorded in more than 1,500 species. Human cannibalism is well documented, b ...

occurs, as has been demonstrated when bone fragments and claws of a cub were found inside the stomach of a male black bear.

Habitat

The bears live on two Japanese islands:

and

. They can be found in the northeastern high snow region and the southwestern low snow region; however, they have been spotted as high as the alpine region more than high. They tend to live in areas where there is an abundance of grasses and trees with berries to support their diet.

Seed dispersal

Forests rely on bears as a great method for plants and trees to spread their seeds. The bears will consume the seeds and move 40% farther than a distance of 500 m from the parent tree. They have the potential to spread seeds over huge areas, helping the plant life spread throughout the area. In autumn, the bears have a greater seed dispersal rate and usually the males have a larger dispersal areas than females.(Koike, S. 2011)

Conservation

There has been a huge impact on Japanese black bears' populations due to human interference.

Habitat destruction Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...

is a problem for these bears as peoples' villages begin to grow. Over-hunting and

poaching Poaching has been defined as the illegal hunting or capturing of wild animals, usually associated with land use rights. Poaching was once performed by impoverished peasants for subsistence purposes and to supplement meager diets. It was set a ...

is also a problem. Bears' parts can be sold on the

black market A black market, underground economy, or shadow economy is a clandestine market or series of transactions that has some aspect of illegality or is characterized by noncompliance with an institutional set of rules. If the rule defines the se ...

for a high price, which makes them very desirable. People kill a lot of these bears, reducing their numbers drastically. Because of this and the

carrying capacity The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. The carrying capacity is defined as t ...

reduction due to

habitat destruction Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...

has resulted in the recognition that the Japanese black bear is at a high risk of

extinction Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

. The species will likely be gone within the next 100 years at the rate they are currently declining.(Horino, S. 2000)

References

Bibliography

* * * * {{Taxonbar, from=Q11954115 Asiatic black bears Mammals of Japan