East China Sea, a marginal sea east of China, where it is called Dōnghǎi (东海/東海) in Chinese, meaning "East Sea"
East Sea (Chinese literature), one of the Four Seas, a literary name for the boundaries of China
South China Sea, a marginal sea south of China and east and south of Indochina, called Biển Đông in Vietnamese, meaning "East Sea"
Sea of Japan, a marginal sea between the Korean Peninsula, Russia and the Japanese archipelago, called Donghae (Korean: 동해; Hanja: 東海; East Sea) in South Korea, and Chosŏn Tonghae (Korean: 조선동해; Hancha: 朝鮮東海; Korean East Sea) in North Korea.
Sea of Japan naming dispute
Baltic Sea, called "East Sea" in various languages
Dead Sea, a salt lake east of Israel, as used in the Bible (Joel 2:20; Ezek. 47:18)
Mare Orientale, Latin for "Eastern Sea", on the Moon
Atlantic Ocean, also referred to as the East Sea or Eastern Sea in poetry and other uses in North America
Pacific Ocean, called the East Sea in poetry and other uses from Australia, New Zealand, China and Japan
Indian Ocean, earlier called the "Eastern Ocean" or "Eastern Sea"
Eastern Sea, the eastern ocean of Middle-earth in J. R. R. Tolkien's fiction
See also
East Sea Campaign, a naval operation of the Vietnam War