| Invasion information | 
| Range in Japan | Almost entire Japan. All the Prefectures of Honshu Island except Nara and Osaka; Hokkaido, Ehime, Kochi, Oita, Miyazaki, and Okinawa Prefs. |   | 
| Origin | Unknown. | 
| Date | Introduced to Japan in late 19 C. The first record in the field was in 1955. | 
| Route | Deliberate: Ornamental plant | 
| Impact | Actually: Competition with native plants. Native organism(s) affected: Native grass and shrub. Spiraea salicifolia, Salix integra, Salix udensis, Malus toringo, etc. in Senjogahara, Nikko, Tochigi Pref.
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| Regulation in Japan | Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. | 
| Introduced range in other countries | China, etc. |