A good soak in a hot bath is just what you need on a cold day.
Snow monkeys living near the resort of Yamanouchi, in the heart of central Japan's hot springs country, have taken to spending much of their time hanging out in the warm waters.
The macaques are already well prepared for Japan's harsh winters, boasting a thick coat of sand-coloured fur.
But their bright red faces seem most relaxed when they fall asleep in the warm bath.
At lot of time is spent grooming, which is important to strengthen bonds between the monkeys, so they carefully pick lice out of each other's fur coat.
The bathing monkeys of Jigokudani, or Hell's Valley, are among the best-loved symbols of wild Japan.
The water in the naturally hot springs can get very hot and can reach temperatures of between 15-32C.