Yaniruma is a home to Korowai people, the people who live in the Tree House. They live in cleared land deep in the rain forest with traditional way, some of them still holding the old beliefs and used to practice until Missionary arrived and built new settlement to get the Korowai and Kombai (the neighbor tribe) more developed.

The missionary arrived in 1970’s brought Christian religion there. Yaniruma was opened to tourist early in 1980’s but till now the place is still the most remote tribe and desired by most of adventurous tourists all at once anthropology expeditions. It is unique cultures and environments make adventure interested to come. Korowai & Kombai people always moves from one place to another in order to be close to the foods and hunted animals provided by nature. Korowai is hunter and gatherer who move and build a new tree house once every 2 or 3 years. They built the houses around 20 meters-50 meters from the ground. The traditional wear of Korowai tribe is very simple, men wear a piece of leave or small penis gourd to cover their penis and women wear the skirt made of woven sago leaves, while the Kombai tribe same with Korowai but some of Kombai men wear the hornbill head instead of the gourd during the feast time. The Korowai area neighbors of Citak Mitak & Asmat Tribe and near Dairam rivers