The Oriah festival of Arunachal Pradesh is celeberated by the Wanchos, adjoining Nagaland in the easternmost trip of the state in the Tirap district. These are hardy people known for their structured village society in which the hereditary village chief still plays a vital role, worships the Sun and Moon God. They invoke nature deities and make animal sacrifices.

The rich festival of the Wonchos are witnessed by only a handful of tourist.

Appeasement of the deities who control the peace and prosperity of the people is the thought behind the celebration. Villagers exchange bamboo tubes of rice beer as a mark of greeting and good will.