He was educated at Mill Hill School and University College London (UCL).
Satow was an exceptional linguist, an energetic traveller, a writer of travel guidebooks, a dictionary compiler, a mountaineer, a keen botanist (chiefly with F.
V.
Dickins) and a major collector of Japanese books and manuscripts on all kinds of subjects.
He also loved classical music and the works of Dante on which his brother-in-law Henry Fanshawe Tozer was an authority.
Satow kept a diary for most of his adult life which amounts to 47 mostly handwritten volumes.
As a celebrity, albeit not a major one, he was the subject of a cartoon portrait by Spy in the British Vanity Fair magazine, 23 April 1903.