country south tapanuli regency
Java ( Indonesian : Jawa ; Javanese :  ; Sundanese :  ) is an island of ___MASK74___ . With a population of over 141 million ( the island itself ) or 145 million ( the administrative region ) Census released in December 2015 , Java is home to 56 . 7 percent of the Indonesian population and is the most populous island on Earth . The Indonesian capital city , Jakarta , is located on western Java . Much of Indonesian history took place on Java . It was the center of powerful Hindu - Buddhist empires , the Islamic sultanates , and the core of the colonial Dutch East Indies . Java was also the center of the Indonesian struggle for independence during the 1930s and 1940s . Java dominates ___MASK74___ politically , economically and culturally . South Tapanuli is a regency in North Sumatra . Its seat is Sipirok . The regency covers an area of 4 , 352 . 86 square kilometres and according to the 2010 census it had a population of 264 , 108 ; the latest estimate ( for January 2014 ) is 274 , 905 . North Sumatra , is a province of ___MASK74___ . It is located on the island of Sumatra , and its capital is Medan . North Sumatra is fourth most populous province in ___MASK74___ after West Java , East Java and Central Java and the most populous Indonesian province outside Java , with over 13 , 5 million inhabitants in 2014 . West Java ( abbreviated as " Jabar ") is a province of ___MASK74___ . It is located in the western part of the island of Java and its capital and largest urban center is Bandung , although much of its population in the northwest corner of the province live in areas suburban to the even larger urban area of Jakarta , even though that city itself lies outside the administrative province . The province ' s population is 46 . 3 million ( in 2014 ) and it is the most populous and most densely populated of ___MASK74___ ' s provinces . Sipirok is a town in North Sumatra province of ___MASK74___ and the seat ( capital ) of South Tapanuli Regency . East Java ( abbreviated as Jatim ) is a province of ___MASK74___ . Located in eastern Java , it includes the islands of Madura , which is connected to Java by the longest bridge in ___MASK74___ , Suramadu Bridge , as well as the Kangean and Masalembu archipelagos located further east and north , respectively . Its capital is Surabaya , the second largest city in ___MASK74___ and a major industrial center . Banyuwangi is the largest regency in East java and also in Java Island Sumatra is a large island in western ___MASK74___ that is part of the Sunda Islands . It is the largest island that is entirely in ___MASK74___ ( two larger islands , Borneo and New Guinea , are shared between ___MASK74___ and other countries ) and the sixth - largest island in the world at 473 , 481 km ( including adjacent islands such as the Riau Islands and Bangka Belitung Islands ). ___MASK74___ ( or ; Indonesian : ), officially the Republic of ___MASK74___ , is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania . Situated between the Indian and Pacific oceans , it is the world ' s largest island country , with more than seventeen thousand islands . At , ___MASK74___ is the world ' s 14th - largest country in terms of land area and world ' s 7th - largest country in terms of combined sea and land area . It has an estimated population of over 260 million people and is the world ' s fourth most populous country , the most populous Austronesian nation , as well as the most populous Muslim - majority country . The world ' s most populous island of Java contains more than half of the country ' s population . Central Java ( abbreviated as Jateng ) is a province of ___MASK74___ . This province is located in the middle of Java . Its administrative capital is Semarang . Medan is the capital of North Sumatra province in ___MASK74___ . Located on the northern coast , and with 2 , 097 , 610 inhabitants at the 2010 census . Medan is the fifth largest city in ___MASK74___ by population after Jakarta , Surabaya , Bandung and Bekasi , also the third largest city by land area ( behind Jakarta and Surabaya ), and the largest Indonesian city outside Java . Its built - up (" or metro ") area made of 18 municipalities or districts was home to 4 , 103 , 696 inhabitants at the 2010 census . The city is bordered by the Deli Serdang Regency to the east , south and west , and the Strait of Malacca to the north , make the city located very strategically for economy as the Strait of Malacca is one of the most important shipping lanes in the world .