| Main Ref. | Klassen, G. and A. Locke, 2007 |
| To | Japan |
| FAO area | Pacific, Northwest |
| From | unknown |
| FAO area | |
| Year | |
| Range | |
| Period | unknown |
| Established in the Wild | |
| Established in Aquaculture | |
| Significant Ecological Interactions | |
| Significant Socio-economic Effects | |
| Introduced by | |
| Reason | unknown |
| Other Reason | |
| Comments | Although reported in Japan, it is unclear whether it is actually C. maenas or a hybrid of C. maenas and a related crab, C. aestuarii. |