Daftar spesies mamalia di Jepang
Ordo: Karnivora

Tsushima leopard cat, masked palm civet, small Indian mongoose, raccoon, Japanese red fox, Ezo red fox, Japanese raccoon dog, Ezo brown bear, Japanese black bear, Japanese badger, sea otter, Japanese marten, Japanese sable, Japanese stoat, Japanese weasel, Siberian weasel, least weasel, American mink, northern fur seal, Steller sea lion, †Japanese sea lion, bearded seal, ribbon seal, northern elephant seal, spotted seal, Kuril seal, ringed seal
Ada lebih dari 260 spesies karnivora, yang sebagian besar memakan daging. Mereka memiliki bentuk tengkorak dan gigi yang khas. Serigala dan berang-berang kini diyakini telah punah di Jepang.
Suborder: Feliformia
Family: Felidae (cats)
Subfamily: Felinae
Genus: Prionailurus
Leopard cat, Prionailurus bengalensis LC
P. b. euptilurus , two populations:
Tsushima leopard cat [ja] (MOE: CR) (Tsushima Island; Natural Monument)
Iriomote cat (MOE: CR) (Iriomote; Special Natural Monument)
Genus: Lynx
Eurasian lynx, Lynx lynx LC extirpated in prehistory
Subfamily: Pantherinae
Genus: Panthera
Leopard, Panthera pardus VU extirpated in prehistory
Tiger, Panthera tigris EN extirpated in prehistory
Family: Viverridae (civets)
Genus: Paguma
Masked palm civet, Paguma larvata LC IUCN (introduced; Honshū, Shikoku, Kyūshū, Ryukyu)
Family: Herpestidae
Genus: Urva
Small Indian mongoose, Urva auropunctata LC IUCN (introduced on Okinawa Island and Amami Ōshima and in areas of the cities of Satsumasendai and Kagoshima)
Suborder: Caniformia
Family: Canidae (dogs, foxes)
Genus: Vulpes
Red fox, Vulpes vulpes LC IUCN
Japanese red fox [ja], V. v. japonica (Honshū, Shikoku, Kyūshū)
Ezo red fox, V. v. schrencki (Hokkaidō)
Genus: Nyctereutes
Japanese raccoon dog, Nyctereutes viverrinus NE (endemic; Honshū, Shikoku, Kyūshū, and adjacent smaller islands; tanuki habitat in Yamaguchi is a Natural Monument)
Ezo raccoon dog [ja], N. v. albus (Hokkaidō, Okushiri Island)
N. v. viverrinus
Genus: Canis
Grey wolf, Canis lupus LC extirpated
Hokkaido wolf, C. l. hattai EX (Hokkaidō)
Japanese wolf, C. l. hodophilax EX (Honshū, Shikoku, Kyūshū)
Family: Ursidae (bears)
Genus: Ursus
Brown bear, Ursus arctos LC IUCN
Ussuri brown bear, U. a. lasiotus (Hokkaidō, Kunashiri, Etorofu)
Asiatic black bear, Ursus thibetanus VU IUCN
Japanese black bear, U. t. japonicus (Honshū and Shikoku, formerly also Kyūshū)
Family: Procyonidae (raccoons)
Genus: Procyon
Raccoon, Procyon lotor LC IUCN (introduced from the Americas)
Family: Mustelidae (mustelids)
Genus: Meles
Japanese badger, Meles anakuma LC IUCN (endemic; Honshū, Shikoku, Kyūshū)
Genus: Enhydra
Sea otter, Enhydra lutris EN IUCN (MOE: CR) (eastern Hokkaidō)
Genus: Lutra
Eurasian otter, Lutra lutra (Tsushima Island)
Japanese river otter, L. l. nippon (MOE: EX) (last recorded on Honshū in 1954 and in Kōchi in 1979)
Hokkaido river otter, L. l. whiteleyi (MOE: EX)
Genus: Martes
Japanese marten, Martes melampus LC IUCN (endemic; Honshū, Shikoku, Kyūshū)
M. m. melampus
Tsushima marten [ja], M. m. tsuensis (MOE: NT) (endemic; Tsushima Island; Natural Monument)
Sable, Martes zibellina LC IUCN
Japanese sable [ja], M. z. brachyura (MOE: EN) (Hokkaidō)
Genus: Mustela
Stoat, Mustela erminea LC IUCN
Japanese stoat [ja], M. e. nippon (MOE: NT) (central and northern Honshū)
Ezo stoat [ja], M. e. orientalis (MOE: NT) (Hokkaidō)
Japanese weasel, Mustela itatsi NT IUCN (endemic to Honshū, Shikoku, Kyūshū, and adjacent smaller islands; introduced to Hokkaidō, Rishiri Island, Rebun Island, Ryūkyū Islands, etc., for rat control)
M. i. itatsi
Yakushima weasel, M. i. sho
Siberian weasel, Mustela sibirica LC IUCN (MOE: EN) (native on Tsushima Island, introduced to western Japan)
M. s. coreana (Tsushima Island)
Least weasel, Mustela nivalis LC IUCN
Japanese least weasel [ja], M. n. namiyei (MOE: NT) (Tōhoku)
North weasel [ja], M. n. nivalis (Hokkaidō)
Genus: Neogale
American mink, Neogale vison LC IUCN (introduced; Hokkaidō, Nagano, Fukushima; records from elsewhere in Honshū and Kyūshū)
Family: Otariidae (eared seals, sealions)
Genus: Callorhinus
Northern fur seal, Callorhinus ursinus VU IUCN (northern Japan)
Genus: Eumetopias
Steller sea lion, Eumetopias jubatus NT IUCN (MOE: NT)
Western Steller sea lion, E. j. jubatus EN IUCN (Hokkaidō and Shimokita Peninsula)
Genus: Zalophus
Japanese sea lion, Zalophus japonicus EX (MOE: CR) (last recorded on Takeshima in 1975)
Family: Phocidae (earless seals)
Genus: Erignathus
Bearded seal, Erignathus barbatus LC IUCN (Hokkaidō and vagrant)
Pacific bearded seal, E. b. nauticus LC IUCN (vagrant)
Genus: Histriophoca
Ribbon seal, Histriophoca fasciata LC IUCN (northeast Hokkaidō)
Genus: Mirounga
Northern elephant seal, Mirounga angustirostris LC IUCN (vagrant)
Genus: Phoca
Spotted seal, Phoca largha LC IUCN (Hokkaidō)
Harbour seal, Phoca vitulina LC IUCN (MOE: NT) (Hokkaidō)
Kuril seal, P. v. stejnegeri DD IUCN (eastern Hokkaidō)
Genus: Pusa
Ringed seal, Pusa hispida LC IUCN (especially northern Hokkaidō)