FWIW, I've heard the same thing, verbatim, about Nagoya companies. Just like every town in Japan thinks that it is the one that discovered that great water makes great soba and great sake, and that all other towns' soba and sake is deficient due to lack of the proper water for it, I think it may be possible that every town in Japan not-so-secretly believes that only their companies are still Japanese and that all other Japanese companies have succumbed to weird foreign influence.