This study aims to analyze legal pluralism in the resolution of Islamic inheritance disputes in Indonesia by highlighting the interaction between fiqh, customary law, and positive law, as well as its implications for substantive justice. This research employs normative legal research with a conceptual approach and qualitative analysis through deductive–inductive reasoning. The data consist of primary, secondary, and tertiary legal materials, including the Compilation of Islamic Law, religious court decisions, scholarly journal articles from the past five years, and relevant legal literature. Data collection techniques are conducted through library research and documentation, while data analysis is carried out through data reduction, data presentation, and conclusion drawing in an interpretative and argumentative manner. Data validity is ensured through source triangulation and the strengthening of arguments based on credible scholarly literature. The findings indicate that the resolution of Islamic inheritance disputes occurs within a dynamic configuration of legal pluralism through patterns of competition, compromise, and integration among fiqh, customary law, and positive law. Customary law tends to be dominant due to its strong social legitimacy, while fiqh functions as a theological norm that provides religious legitimacy, and positive law serves as a formal instrument ensuring legal certainty.
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