Background: Stunting remains a public health issue in Papua and is influenced by multiple factors, including early marriage. The implementation of Raising the Marriage Age (PUP) in indigenous communities is challenged by customary values that determine marriage readiness through social maturity rather than chronological age. Objective: This study aims to analyze the marriage rules of the Manirem indigenous community, the community’s response to the initiative to raise the marriage age, and the factors that support and hinder its implementation as an effort to prevent stunting in Beneraf Village, East Coast District, Sarmi Regency. Methods: This qualitative case study used observation, in-depth interviews, Focus Group Discussions, and document review. Informants included traditional leaders, a religious leader, youth leaders, women leaders, and the Head of Beneraf Village. Data were analyzed descriptively and thematically. Results: Participating community leaders generally expressed positive responses to PUP, although its implementation remains influenced by customary norms regarding adulthood and marriage readiness. Support comes from traditional leaders, religious institutions, village government, women, and youth, while limited education, reproductive health information, socioeconomic conditions, and institutional capacity remain barriers. The findings were synthesized into the Manirem Culture-Based PUP Integration Model, which integrates customary institutions, cultural communication, and public health objectives. Conclusion: PUP implementation in indigenous communities should be adapted to local sociocultural values and strengthened through collaboration among legitimate community actors to support quality family formation and stunting prevention.
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