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Tokyo salamander
Conservation status
Vulnerable  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	Urodela
Family:	Hynobiidae
Genus:	Hynobius
Species:	H. tokyoensis
Binomial name
Hynobius tokyoensis Tago, 1931

The Tokyo salamander (Hynobius tokyoensis) is a species of salamander in the family Hynobiidae, endemic to Japan. Its natural habitats are temperate forests, freshwater springs, arable land, irrigated land, and canals and ditches. It is threatened by habitat loss and racoon (araiguma) predation. Many different species of amphibian have unbalanced sex ratios. This trend is no different in Hynobius Tokyoensis; the sex ratio between males and females is about 1.5:1. Although this does not play as large of a role as habitat destruction when it comes to the decline of this species, it is still significant. Considering their environmental preferences, they are usually found in paddy fields. Mid-Summer drainage from these fields hinders the population's ability to thrive as this would occur before these populations could complete metamorphosis.

References

1. IUCN SSC Amphibian Specialist Group (2021). "Hynobius tokyoensis". IUCN Red List of Threatened Species. 2021: e.T59103A177612384. doi:10.2305/IUCN.UK.2021-1.RLTS.T59103A177612384.en. Retrieved 15 November 2021.
2. Kusano, Tamotsu, and Masafumi Inoue. “Adult Sex Ratio of a Population of the Japanese Salamander, Hynobius Tokyoensis (Caudata: Hynobiidae).” Current Herpetology, vol. 30, no. 2, Dec. 2011, pp. 129–135. EBSCOhost.
3. Natuhara, Yosihiro (2021-07-23). "Conservation of endangered species in Japan's agroecosystems: focusing on specified class II nationally rare species of wild fauna/flora". Landscape and Ecological Engineering.

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• IUCN Red List vulnerable species
• Hynobius
• Endemic amphibians of Japan
• Amphibians described in 1931
• Taxa named by Katsuya Tago
• Salamander stubs