Looks like there is a lot of confusion about Koryu Karate.
The kanji for "Karate" is the same as "Tode" but just pronounced differently. It is not that same kanji as what is used these days like in Shotokan or Shito-ryu, which means "empty hand".
"Koryu Karate" is a mix of two schools; Hontai Kijin Chosui-ryu Kukishinden dakentaijutsu and Shindo Tenshin-ryu (aka Tenshin Ko-ryu). These two are japanese ryuha that can be found in the book Bugei Ryuha Daijiten, but have quite a bit of Chinese MA influence before the Meiji restoration. That is why Tanemura Sensei uses "Chinese hand" instead of "empty hand". It does not look like Shito-ryu, Goju-ryu, Shotokan, Wado-ryu, ect.