Bufo japonicus
Silhouette: Steven Traver · PhyloPic
In 3 days ~60% in a week ~90%
The Japanese common toad, Japanese warty toad or Japanese toad (Bufo japonicus) is a species of toad in the family Bufonidae. It is endemic to Japan. Its natural habitats are subarctic forests, temperate forests, temperate shrubland, swamps, freshwater marshes, intermittent freshwater marshes, freshwater springs, arable land, rural gardens, urban areas, ponds, and irrigated land. Amplexus is the mating behaviour involved in the Japanese common toad during the breeding season.
This species was originally first described as Bufo praetextatus in 1826. However, the specimen that is used to name it is lost, and since this name is used by only a few authors, it is considered that B. japonicus is valid instead.
There are two subspecies, Western-Japanese common toad (Bufo japonicus japonicus) and Eastern-Japanese common toad (Bufo japonicus formosus). They are distinguished by the size of the tympanum, smaller in B. japonicus japonicus and larger in B. japonicus formosus. However, some taxonomic authorities consider B. japonicus formosus to be a separate species (B. formosus), leaving B. japonicus monotypic (having no subspecies).
B. japonicus formosus is known to hybridise in... Wikipedia →
Recording0:24
Japan · 2025
© naturalist49784 · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report a Japanese Toad sighting in Sendai on a given day, based on 38 verified sightings from GBIF citizen-science data. It is the most-seen of the 5 amphibians we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
May and July
In those months about 50% of wildlife watchers report a Japanese Toad in Sendai on a given day, against under 5% in November to February, the lowest months.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Japanese Toad sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 2 cities where we can rate Japanese Toad sightings, Sendai has the highest daily chance: about 30%. Next come Tokyo (Japan, about 10%).
Same order: Anura
The closest relatives of the Japanese Toad that you can see in Sendai (order Anura, Frogs and Toads) are Japanese Brown Frog (about 30%), American Bullfrog (about 20%) and Kajika Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Toad is recorded against all the amphibians logged in Sendai (38 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
