| Invasion information | ||
| Range in Japan | Izu Islnads (Izuoshima, Niijima, Miyakejima), Hokkaido (several areas in southern and western part). There is a record in Kuchinoshima Is. (Tokara Islands) where establishment status is unknown. |
|
| Origin | Unknown. Possibly several areas in Japan. | |
| Date | The first record in Hokkaido was in 1985. | |
| Route | Accidental: Tadpole of this species may have hitchhiked on Carp seedling for aquaculture (Hokkaido population). | |
| Impact | Unknown Native organism(s) affected: | |
| Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
| Introduced range in other countries | Hawaii (from Japan) | |
| Reference | Notes |
|