West Sea

(informal, colloquial) Synonym of Qinghai Lake (as found in English, from sources in China)

(informal, colloquial) Synonym of Yellow Sea; Ellipsis of West Korea Sea. (as found in English language material from Korea)

(informal, colloquial) Synonym of South China Sea; Ellipsis of West Philippine Sea. (as found in English language material form the Philippines)

(informal, colloquial) Synonym of Sea of Japan (as found in English, from sources in Japan)