And the Vintage Guitar articles you linked didn’t cite any links to Tokai that I saw and recycled the same information available elsewhere.
In the article about Fresher the closest it came to talking about Tokai was a non linkage.
“ Little is known of these early Fresher guitars, but Mr. Noguchi recalls them as being pretty much low end instruments when compared to other brands available at the time, including Greco, Tokai, Guyatone, Fernandes and Ibanez.”