This model is one of those that there is less direct evidence for, but there is still a very strong argument for its traditionality. Research by David Lister indicates that the modern usage of the word “Tato” comes from the work of Michio Uchiyama (1878-1967), who used the concept on several different polygons. This exact model without the corners cut off is referred to as an “octagonal ornament” in Isao Honda’s “The World of Origami” (1965), and presented among well-known traditional models like the Crane, Star Box, and Iris. But Honda does not attribute any of the models in his book, so we can’t take that as direct evidence of this model’s traditionality.
However, we do know that the twist-fold structure forms the basis of much of modern geometric origami, and several creators have derived this structure from the idea of a twist fold, so we could easily classify this as traditional under what I would call the multiple-creators doctrine– if a model is created independently by several people, then none of them has exclusive ownership of the concept, and the model is functionally traditional. These models tend to be fairly obvious results of fundamental concepts or geometric properties, and this is no exception. It’s pretty hard to fold all the points of an octagon in the same way and *not* come up with something similar to a twist tato.