Four American minks were imported into Japan in 1928.
Sources
- Neovison vison / Invasive Species of Japan (nies.go.jp)
- https://www.jstage.jst.go.jp/article/nesr/29/0/29_1/_pdf/-char/ja (jstage.jst.go.jp)
- http://bluelist.pref.hokkaido.lg.jp/db/detail_nenbetsu.php?k=01&cd=14 (bluelist.pref.hokkaido.lg.jp)
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