The Osing or Using (Osing: ; ) are indigenous ethnic group native to easternmost part of the Java island (especially in Banyuwangi), Indonesia. They are the descendants of the people of the ancient Kingdom of Blambangan. The population of Osing people are approximately 400,000 which concentrated in the Banyuwangi Regency of East Java Province. Demography The Osing people are settled in several districts in the central and northern regions of Banyuwangi Regency especially in Banyuwangi district, Rogojampi district, Sempu district, Glagah district, Singojuruh district, Giri district, Kalipuro district and Songgon district. The Osing community or also commonly known as Laré Osing by some circles and as a result of research, are considered as the natives of Banyuwangi Regency, including an area at the easternmost tip of the Java island that is also known as Blambangan Peninsula. This community of people are spread throughout fertile farming villages in the central and eastern regions of Banyuwangi Regency, administratively includes districts such as Giri, Kabat, Glagah, Belimbing Sari, Rogojampi, Sempu, Singojuruh, Songgon, Cluring, Banyuwangi (city), Genteng and Srono. In the four later districts, integration with non-Osing people occurs usually with migrants from western East Java, Central Java including Jogjakarta; which the Osing people refer them as Wong Jawa Kulon (Western Javanese people). Language The native language of Osing people is the Osing language, it is categorized as part of the Javanesic language family. Linguistically speaking, this language has been influenced heavily by its sister languages notably the Javanese (mainly eastern dialects) and Balinese. The main factor is probably due to Osing's cultural land which located between the two cultural lands of Javanese and Balinese people. History The history of the Osing people dates back to the end of the 15th century, at the time of the fall of Majapahit; to resist conversion to Islam, many of them fled east to Banyuwangi, Bali and Lombok. Much of Java were converted to Islam by the Muslim Makassars in the 16th century. The remaining Hindu princes from Majapahit established the Kingdom of Blambangan, which stretched from the Blambangan peninsula right up to the Tengger mountains of Central Java. Blambangan held sway for slightly more than two hundred years before they finally surrendered to the second Mataram Sultanate in 1743, and the eventual Islamization of the Osing people. However, the conversion process wasn't complete until the mid-19th century, though small communities of Muslims do pre-exist this date.