Question: Sitawaka fort was built in what island country located southeast of the Republic of India?

Context paragraphs:
Geography of New Zealand: New Zealand (Aotearoa) is an island country located in the south-western Pacific Ocean, near the centre of the water hemisphere.  The country encompasses two major islands—the North Island (or "Te Ika-a-Māui") and the South Island (or "Te Waipounamu")—that are separated by the Cook Strait; a third, less substantial island, Stewart Island (or "Rakiura"), is located 30 km off the tip of the South Island across Foveaux Strait.  Other smaller islands include Waiheke Island, Chatham Island, Great Barrier Island and more, although many are uninhabited.

Palau: Palau ( , historically Belau or Pelew), officially the Republic of Palau (Palauan: "Beluu er a Belau" ), is an island country located in the western Pacific Ocean.  The country contains approximately 340 islands, forming the western chain of the Caroline Islands in Micronesia, and has an area of 466 km2 .  The most populous island is Koror.  The capital Ngerulmud is located on the nearby island of Babeldaob, in Melekeok State.  Palau shares maritime boundaries with Indonesia, the Philippines, and the Federated States of Micronesia.

Jamaica: Jamaica ( ) is an island country situated in the Caribbean Sea, consisting of the third-largest island of the Greater Antilles.  The island, 10,990 sqkm in area, lies about 145 km south of Cuba, and 191 km west of Hispaniola (the island containing the countries of Haiti and the Dominican Republic).  Jamaica is the fourth-largest island country in the Caribbean, by area.

Indonesia: Indonesia ( or ; Indonesian: ), officially the Republic of Indonesia (Indonesian: "Republik Indonesia" ), 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 1,904,569 km2 , Indonesia 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 floor( /1e6) 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, Java, contains more than half of the country's population.

Marshall Islands: The Marshall Islands, officially the Republic of the Marshall Islands (Marshallese: "Aolepān Aorōkin M̧ajeļ" ), is an island country located near the equator in the Pacific Ocean, slightly west of the International Date Line.  Geographically, the country is part of the larger island group of Micronesia.  The country's population of 53,158 people (at the 2011 Census) is spread out over 29 coral atolls, comprising 1,156 individual islands and islets.

List of companies of Indonesia: Indonesia 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 1,904,569 km2 , Indonesia 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.

Sitawaka fort: Sitawaka fort (Sinhalese: සීතාවක බලකොටුව ), was built by the Sitawaka kingdom in Avissawella, Sri Lanka.  It was adjoined with the palace of king Rajasinha I.  The fort had been mounted with cannon on the river bank.

List of companies of Sri Lanka: Sri Lanka is an island country located southeast of the Republic of India and northeast of the Maldives.  According to the International Monetary Fund, Sri Lanka's GDP in terms of purchasing power parity is second only to the Maldives in the South Asian region in terms of per capita income.

Sri Lanka: Sri Lanka ( or ; Sinhalese: ශ්‍රී ලංකා "Śrī Laṃkā ", Tamil: இலங்கை "Ilaṅkai"), officially the Democratic Socialist Republic of Sri Lanka, is an island country located southeast of the Republic of India and northeast of the Maldives.  Its current existence is due to the merger of several empires present on the island under European colonial rule.

List of companies of Jamaica: Jamaica is an island country situated in the Caribbean Sea, consisting of the third-largest island of the Greater Antilles.  The island, 10,990 sqkm in area, lies about 145 km south of Cuba, and 191 km west of Hispaniola (the island containing the nation-states of Haiti and the Dominican Republic).  Jamaica is the fourth-largest island country in the Caribbean, by area.

Supporting paragraphs: Sitawaka fort Sri Lanka
Answer: Sri Lanka