Those creatures are the "tanukis", they're a type of "Yōkai", a class of creatures from Japanese folklore. Those images are from the Edo period. : r/Weird
When Nothing But Unnecessarily Large Tanuki Testicles Will Do – Only In Japan
Tanuki - Facts and Beyond | Biology Dictionary
Tanuki are Japanese racoon dogs. Mischievous looking critters with a dog-like face and the body of a racoo… | Japanese illustration, Japanese art, Japanese folklore
Tanuki the Tipsy Trickster: Why a Well-Endowed Raccoon Dog Is Big in Japan - Atlas Obscura
In search of Japan's biggest tanuki, we stumble across something equally big | SoraNews24 -Japan News-
Tanuki genitals - The Japan Times
Tanuki: The Canine Yokai with Gigantic Balls
When Nothing But Unnecessarily Large Tanuki Testicles Will Do – Only In Japan
Tanuki, Yōkai from Japanese Folklore | Japan Avenue