Singapore officially the Republic of Singapore, is a sovereign city-state and island country in Southeast Asia. It lies off the southern tip of the Malay Peninsula and is 137 kilometres (85 mi) north of the equator. Made up of the lozenge-shaped main island (widely known as Singapore Island but also as Pulau Ujong, its native Malay name) and over 60 much smaller islets, it is separated from Peninsular Malaysia by the Straits of Johor to its north and from Indonesia’s Riau Islands by the Singapore Strait to its south. The country is highly urbanised, with very little primary rainforest remaining. Its territory has consistently expanded through land reclamation. Part of various local empires since being settled in the second century AD, modern Singapore was founded in 1819 by Sir Stamford Raffles as a trading post of the East India Company with the permission of the Johor Sultanate. The British obtained sovereignty over the island in 1824, and Singapore became one of the British Straits Settlements in 1826. Occupied by the Japanese during World War II, Singapore declared independence from the United Kingdom in 1963 and united with other former British territories to form Malaysia, from which it departed two years later. Since then, it has developed rapidly, earning recognition as one of Four Asian Tigers.