Shimokita Peninsula
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.