Crimon Java National Park, also Karimunjava National Park, is a national marine park designated in the Karimun Java archipelago, Jepara Regency, Central Java, Indonesia. It lies 80 km north west of Jepara, Central Java in the Java Sea. The national park was formally declared as Marine Protection Area in 2001. Based on popular local myth, this archipelago was discovered by Sunan Nyamplungan, the nephew of Sunan Kudus who is one of the Wali Sanga.