| Invasion information | ||
| Range in Japan | Relatively abundant in Kanto to western Japan. |
|
| Origin | Unknown. | |
| Date | The first record was in 1940 at Osaka | |
| Route | Accidental: Details unknown | |
| Impact | Allelopathy | |
| Regulation in Japan | No action for prevention, mitigation, control, or eradication. | |
| Introduced range in other countries | Under Construction. | |
| Reference | Notes |
|