Zabag is thought to have been an ancient territory located south of China somewhere in Southeast Asia, between the Chenla Kingdom and Java. Several historians have associated this kingdom with Srivijaya and thought its location was somewhere in Sumatra, Java or Malay Peninsula. Indonesian historians have suggested that Zabag is connected to the present day Muara Sabak area, the estuary of Batang Hari River in East Tanjung Jabung Regency, Jambi province. Zabag could also have been located in Java, not Srivijaya because Zabag is noted to annex Srivijaya, and the size of Zabag is only half the size of an island called Ramni (Sumatra).

Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's most populous island, home to approximately 56% of the Indonesian population. Indonesia's capital city, Jakarta, is on Java's northwestern coast.