The aim of this article is to explore the perceptions and understanding of the term kejawen, not only in academic publications (from Geertz to Mulder), but first and foremost in terms of changes to Indonesian law and society. Kejawen, traditional Javanese beliefs and traditions, are officially not recognised in Indonesia as a “true” religion (agama). This paper discusses the definitions as well as the interpretations of religion in contemporary Indonesia in the context of religious discrimination, especially “non-official” religions and beliefs in the world’s largest Muslim – but formally still not Islamic – state.