Translation guide
An invasive species is a non-native organism that causes harm to the environment, economy, or human health. This guide covers how to express this concept in Japanese, from formal ecological terms to everyday expressions.
Invasive species have a serious impact on native species.
Legal term under Japan's Invasive Alien Species Act. Refers to designated invasive species that are regulated.
Raccoons are designated as an invasive alien species.
General term for 'alien species' or 'non-native species'. Not all外来種 are invasive; context is needed to imply harm.
Some alien species have a negative impact on the ecosystem.
Expressions used in general conversation or media when talking about harmful non-native species.
A slightly less formal phrase that combines 'alien' and 'invasive'. Common in news articles.
Invasive alien species are rapidly increasing.
Descriptive phrase meaning 'alien species that destroy the ecosystem'. Used when explaining the concept to a general audience.
Very simple ways to refer to invasive species in casual conversation, often with a negative nuance.
外来種 (alien species) is a neutral term for any non-native species, regardless of impact. 侵略的外来種 specifically means invasive species that cause harm. In English, 'invasive species' always implies harm, so be careful not to use 外来種 alone when you mean invasive.
Not all alien species are invasive.
The direct translation '侵入種' (しんにゅうしゅ) is rarely used and may not be understood. Stick to the established terms above.
Efforts are underway to eradicate invasive species that destroy the ecosystem.
Overpopulated invasive species are driving out native species.