Shiba Shirō (柴四郎), better known for his pen name Tōkai Sanshi (東海散士, Wanderer of the Eastern Sea), (21 June 1852 – 13 December 1922) was a political activist and novelist during the Meiji period. He was born into a samurai family and fought for domain of Aizu during the Boshin War from 1868 to 1869, after which the Aizu domain was abandoned. He was educated at different facilities in Japan and in the United States, and he served in the military during the First Sino-Japanese War and Russo-Japanese War. His major works include Strange Encounters with Beautiful Women (Kajin no Kigū), first serialized in 1885 and concluded in 1897.