Muhammad Ainun Nadjib (born 27 May 1953), best known as Emha Ainun Nadjib or Cak Nun/Mbah Nun, is an Indonesian poet, essayist, and humanist. Born in Jombang, East Java, Nadjib began writing poetry while living in Yogyakarta, publishing his first collection in 1976. He became one of the city's predominant poets by the late 1980s, and by then had also began writing essays. He is the leader of the Kiai Kanjeng group, which stages dramas and musical performances on religious themes.