Yes, but there doesn't appear to be any instance in the literature where Oohashi's brain-wave results were confirmed by other investigators. In any case, an unconscious brain-wave isn't hearing, and that's what we work with.
Dr. Toole has discussed this in Sound Reproduction and at p.443 refers to the work of Plenge et al where a difference between a 15KHz and 20KHz cutoff was inaudible and the more recent paper subsequent to that of Oohashi where Nishiguchi et al found no audible results in ultra-high frequencies(this one is available online
here ). He also comments on the somewhat related study by Meyer and Moran, which has been discussed here in the past, which showed that running excellent quality SACDs and DVD-As through a 16 bit/44.1KHz A/D/A conversion, thereby "downgrading" them to the regular CD standard, made no audible difference in their excellence.