ニホンザル
Jigokudani is not the farthest north that monkeys live. The Shimokita Peninsula is at the northern part of the Honshū island and the northwest area of this peninsula, latitude +41°31' longitude +140°56', approximately north from Jigokudani is the northern limit of Japanese macaque habitat. No (non-human) primate is known to live in a colder climate.