The Citak Asmat of Indonesia, numbering approximately 13,500 people, are No Longer Unreached. They are a matrilineal Asmat subgroup who call themselves Kau, distinct from the region's other patrilineal Asmat divisions, inhabiting South Papua's alluvial swamps first reached by Dutch traders in 1623 and later incorporated into Indonesia. They mostly adhere to Protestantism and Citak is their primary language.