| Invasion information | ||
| Range in Japan | Osaka and Hyogo Pref. |
|
| Origin | Unknown | |
| Date | It was found at Hamadera coast in about 1932 | |
| Route | Unknown | |
| Impact | Unknown | |
| Regulation in Japan | Not regulated | |
| Introduced range in other countries | Unknown. | |
| Reference | Notes |
|