Japanese Macaque

Fascinating facts about the Japanese Macaque

• Japanese macaques are the only non-human primates that live that far north, holding the title of the northernmost-living non-human primate. They survive winters where snow blankets the ground for months, and their thick coat lets them endure temperatures as low as −20 °C (−4 °F). This extreme cold tolerance lets them occupy subarctic forests that no other monkey can, expanding the ecological reach of primates into truly temperate zones.
• Males tip the scales at an average of 11.3 kg (25 lb) and stand about 57 cm tall, while females average 8.4 kg (19 lb) and 52.3 cm in height. This sexual dimorphism means males are a few centimeters taller. The size gap also reflects climate adaptation: individuals in colder regions.
• A single female named Imo sparked a cultural ripple when she began washing sweet potatoes in river water, then seasoning them in salty seawater. Other troop members soon copied her technique, and the behavior spread across generations until almost every monkey except the oldest was washing and seasoning food. This socially transmitted innovation shows that Japanese macaques can develop and preserve complex traditions, a rare glimpse of animal culture that mirrors human learning.
• A 1989 survey counted roughly 114,431 wild Japanese macaques across Honshu, Shikoku and Kyushu. Their numbers have risen since the 1940s thanks to legal protection and the loss of natural predators, but the high density also fuels crop damage, prompting costly culling and fence upgrades. Understanding population size is key to balancing conservation with human interests.
• Japanese macaques are surprisingly strong swimmers; observers have recorded individuals covering more than half a kilometer in water.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Japanese Macaque

In the snow-encrusted mountains of Japan, the Japanese Macaque, also known as the snow monkey, navigates its frosty realm with a quiet confidence, its thick fur a testament to its remarkable adaptability. As it moves through the forest, its agile limbs propel it with ease, sending powdery snow swirling around its feet, while its inquisitive gaze misses nothing, drinking in the subtleties of its winter wonderland. With a social intelligence that is both fascinating and poignant, the Japanese Macaque weaves a complex tapestry of relationships, its troop a microcosm of cooperation and hierarchy.

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