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Description
Japanese Common Toad
Scientific Name: Bufo japonicus
Common Name: Japanese Common Toad
Species Overview
Size: Adults typically reach 3.5 to 6 inches (9 to 15 cm), with females generally larger and more robust than males.
Appearance: The Japanese Common Toad is a sturdy, heavy-bodied species with coarse, warty skin ranging from reddish-brown and tan to olive or dark brown. Many individuals display faint mottling or subtle darker patches along the back. The parotoid glands are large and oval, positioned prominently behind the eyes. The underside is pale and may show light speckling. Compared to other Asian toads, this species often has a broader head and more angular jawline. Juveniles are darker and smoother but develop heavier texture with age.
Distribution: Native to Japan, occurring across Honshu, Shikoku, and parts of Kyushu. It is absent from Hokkaido. Several regional subspecies exist, contributing to natural variation.
Habitat: Wild populations occupy forests, grasslands, gardens, agricultural areas, and suburban environments. They breed in ponds, rice paddies, ditches, and slow-moving freshwater sources. They favour humid climates with seasonal temperature swings. In captivity, they thrive in large terrestrial enclosures with moderate humidity and deep substrate.
Behaviour: Primarily nocturnal, Japanese Common Toads emerge at night to forage actively. They rely on camouflage, stillness, and their potent skin secretions as defence. They are solitary, territorial to a moderate degree, and may travel long distances during breeding seasons. Their movement includes slow walking and deliberate, heavy hopping.
Captive Care
Enclosure: A single adult requires a minimum 24 × 18 × 18 inches (60 × 45 × 45 cm) enclosure. Provide deep, slightly moist soil or coconut fibre substrate mixed with leaf litter for burrowing and shelter. Add cork flats, logs, rocks, and dense plant cover to create shaded hiding areas. Include a shallow water dish large enough for soaking. For multiple individuals or larger specimens, upgrading to 36 × 18 × 18 inches (90 × 45 × 45 cm) is recommended.
Temperature and Humidity:
Ambient temperature: 70 to 76°F (21 to 24°C)
Warm area: 78 to 82°F (26 to 28°C)
Night temperature: 60 to 68°F (16 to 20°C)
Humidity: 50 to 70%, with light misting and natural drying cycles. They tolerate cooler nights better than many tropical species.
Lighting: Provide low-level UVB (2 to 5%) with shaded areas throughout the enclosure. Maintain a consistent day and night cycle. Bright lighting is unnecessary and should be diffused.
Diet: Offer a varied insect diet including crickets, roaches, worms, black soldier fly larvae, and occasional soft-bodied invertebrates. Supplement prey with calcium and multivitamins. Juveniles feed more frequently, while adults benefit from a moderated schedule to avoid weight gain.
Behaviour in Captivity: Japanese Common Toads are hardy and adaptable when provided stable humidity and cool-to-moderate temperatures. They hide extensively during the day and become bold feeders at night. Handling should be avoided due to their sensitive skin and strong defensive secretions.
Genetics Note
There are no recognised morphs for the Japanese Common Toad. Natural variation occurs across its range in dorsal tone, patching, and pattern contrast, but these differences are tied to locality and subspecies rather than defined genetic morphs.