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| Subspecies: | Unknown |
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| Est. World Population: | |
| CITES Status: | NOT LISTED |
| IUCN Status: | Near Threatened |
| U.S. ESA Status: | NOT LISTED |
| Body Length: | |
| Tail Length: | |
| Shoulder Height: | |
| Weight: | |
| Top Speed: | |
| Jumping Ability: | (Horizontal) |
| Life Span: | in the Wild |
| Life Span: | in Captivity |
| Sexual Maturity: | (Females) |
| Sexual Maturity: | (Males) |
| Litter Size: | |
| Gestation Period: | |
Habitat:
It roosts in natural caves, abandoned mines, unused tunnels, sometimes in buildings and on the under surfaces of bridges and rarely in tree cavities (Sano 2015). Hibernates in natural caves. Forages in forest. Feeds mainly on Lepidoptera, takes part of its prey from foliage, tree bark of ground because of presence of non-volant arthropods in food remains (Tiunov 1997). Pregnant females and a few adult males congregate and form maternity colonies of several to ca. 200 bats. In Kyushu, single young is born in early June (Funakoshi 1988, 1991). Copulation occurs in autumn (Uchida and Mò„ri 1972). Females give first birth at 1 year of age, the pregnancy ratio in adult females is extremely high (Kuramoto et al. 1988, Funakoshi 1991).
Range:
This species is known from Siberia (the westernmost locality is in the Tunka area westward from Baikal; Botvinkin 2002) across to the Pacific Coast of Russia, Korean Peninsula, the provinces of Heilongjian and Jilin in northeast China, and Japan, where it is found on Hokkaido, Honshu, Shikoku, Kyushu and Kochinoerabu Island (Smith and Xie 2013: Yoon 2010: Sano 2015).
Conservation:
This species occurs in some protected areas and known roosts should be protected. It is listed as Vulnerable (VU) in the Japanese Red List (Ministry of the Environment 2014), and Near Threatened (NT) in the Chinese Red List (Jiang et al. 2016).It is listed in Red Data Lists of two Russian regions.