I'm a Japanese/Australian born in Kanagawa, Japan. A translator by trade, I hunt, breed, and show the Nihon Ken.
Ohh... I really like some of these dogs!
About how old are the photos of the colored Kishu? Doesn't seem too long ago if the photos existed.
I think the "black sesame" (I can't transliterate it, but it's "壹神風号") Kishu on page 78 is 1941. I found his image before and saved it with that note.