It could be; I don't know all that much about Australia.... This is true, but the symbolism of ancient Japanese fables was somewhat esoteric, on common with a lot of old folktales. There is other symbolism at work too, as the badger meant to be cowardly and sneaky and other things too, wheras lions (which the Japenese wouldn't have know about at the time the fable was written) and wolves tend to have more positive attributes. Badgers are actually native to Japan; they have a very wide distribution.