From the article: "Japanese carmakers Honda, Mazda and Suzuki are also due to be inspected by the authorities over the same issue."; those are all major Daihatsu customers pre-Toyota acquisition.
Toyota is essentially being forced to fall on a sword they acquired and no actual corporate wrongdoing (by American standards) seem to have occurred by Toyota executives; all the fault seems to lie entirely at Daihatsu's feet.
Sucks, because a lot of people are going to shy away from what is probably the best car brand in the US, and the only major car company left manufacturing US market cars in the US.
(Why do I specifically phrase it that way? The Big 3 sell most of their US-made cars in Europe with the only actually notable exception being some members of the F150 series; almost all of the Toyota cars sold in the NA market are US and Canadian made.)