Mercator was a cartographer from Rupelmonde (Flanders). He is known for his projection world map, which is named after him.
G. Mercator: Japan. London 1625. ca. 13 x 17 cm.Totius Orbis Cogniti Universalis Descriptio. In: Cosmographia. Amsterdam 1605. Modelled on the Ortelius-Teixeira type. (private collection)