2,180 (1993 R. Doriot).
Papua Province, Mamberamo Raya regency, Kaipuri and Poiwai villages; Kurudu islands between east tip of Yapen island and northwest mainland.
Lexical similarity: 71% with Wabo [wbb], 46% with Western Serui. Kaipuri dialect has highest lexical similarity with Yapen group.
Vigorous. Religious services.