Mr. Moto is a fictional Japanese secret agent created in a series of spy and adventure novels by the American author John P. Marquand. He appeared in six novels published between 1935 and 1957, which were set in 1930s China on the eve of the Second Sino-Japanese War. He became even more widely known from Hollywood films and a radio series. Marquand created the character for the Saturday Evening Post, which was seeking stories with an Asian hero after the death of Charlie Chan's creator Earl Derr Biggers.

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