Sir Ernest Mason Satow (1843–1929) was a legendary British diplomat. He played a key role in Anglo-Japanese and -Chinese relations, particularly in Bakumatsu and Meiji Era Japan, and in China after the Boxer Rebellion. He also served in Siam (present-day Thailand), Uruguay, and Morocco, and represented Britain at the Second Hague Peace Conference in 1907. Satow passed away eighty-seven years ago on August 26, 1929.