| Invasion information | ||
| Range in Japan | Almost entire Japan. Northern most distribution is Hakodate, southern Hokkaido. |
|
| Origin | Continental China | |
| Date | 1728 or 1736 | |
| Route | Deliberate: For horticulture, and as food and timber. | |
| Impact | Competition with native and crop plants. Because sexual reproduction of this species is very rare, there may be small risk of hybridization with native congeners. Native organism(s) affected: Native and crop plants. | |
| Regulation in Japan | Introduction to the wild is regulated in Aichi Pref. | |
| Introduced range in other countries | Unknown. | |
| Reference | Notes |
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Although this species had commonly been used for food and timber in past, the use is currently small, because of import of cheep products from China. |