Vinland Map, a 15th-century redrawing of a 13th-century original, is the first western map to refer to the sea as the "East Sea" ("mare Occeanum Orientale").
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"Minor Eastern Sea" in a early 18th-century German map
Maps with "Sea of Korea"
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An early 17th-century Portuguese map; the first instance of "Sea of Korea ("Mar Coria") appearing on a map.
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"Sea of Joseon" in a late 19th-century Japanese map.
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"Sea of Korea" in a mid 18th-century French map.
Maps with "Sea of Japan"
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An early 17th-century map drawn by an Italian missionary in China. It is the first map in which the term "Sea of Japan" appears.