Welcome to Taiwan, Taiwan also known, especially in the past, as Formosa (from Portuguese: Ilha Formosa, "Beautiful Island"), is an island situated in East Asia in the Western Pacific Ocean and located off the southeastern coast of mainland China. It comprises 99% of the territory of the Republic of China (ROC) since the 1950s. Therefore the term "Taiwan" is also a common name to refer to the Republic of China itself. Separated from the Asian continent by the 160 km (99 mi) wide Taiwan Strait, the main island of the group is 394 km (245 mi) long and 144 kilometres (89 mi.) wide. To the northeast are the main islands of Japan and the East China Sea, and the southern end of the Ryukyu Islands of Japan is directly to the east; the Batanes Islands of the Philippines lie to its south across the Bashi Channel.