Kido Matsuko (木戸 松子) (born Kizaki Kei (木崎 計); November 22, 1843 – April 10, 1886), later known as the nun Suikōin (翠香院), was a Japanese woman from the late Edo period to the Meiji period.[1] She was formerly a geisha under the stage name Ikumatsu (幾松) from Sanbongi, Kyoto. She was the lover (and later the wife) of Katsura Kogorō (later Kido Takayoshi), who would go on to become one of the Three Great Nobles of the Restoration.