By the 10th-century, Java had one of the most complex economies in Southeast Asia. Despite the importance of rice farming which acts as the chief tax income for the Javanese courts, the influx of sea trade in Asia between the 10th and 13th centuries forced a more convenient currency to the Javanese economy. During the late 8th-century, ingots made of gold and silver were introduced. These are the early Nusantara coins.[1]
- ^ Christie 1996, p. 99.