| Invasion information | ||
| Range in Japan | Almost entire Japan including Okinawa. |   | 
| Origin | Unknown. | |
| Date | 1880s | |
| Route | Deliberate: As ornament. | |
| Impact | Competition with native species. Native organism(s) affected: Native grass species. | |
| Regulation in Japan | Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. | |
| Introduced range in other countries | Taiwan, Australia, New Zealand, Saudi Arabia, South Africa, etc. | |
| Reference | Notes | 
| 
 | 100 of the Japan’s Worst Invasive Alien Species Several local governments in Japan is alerting to stop cultivation and transplanting. |