| Kido Matsuko | |
| Native Name: | 木戸 松子 |
| Native Name Lang: | ja |
| Birth Name: | Kizaki Kei |
| Birth Date: | 22 November 1843 |
| Birth Place: | Obama Domain, Wakasa Province, Japan |
| Death Place: | Kyoto, Kyoto Prefecture, Japan |
| Resting Place: | Kyoto Ryozen Gokoku Shrine, Kyoto, Kyoto Prefecture, Japan |
| Nationality: | Japanese |
| Other Names: | Ikumatsu Okabe Matsuko Suikōin |
| Occupation: | nun, noblewoman, former geisha |
| Era: | Edo period, Meiji period |
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| Works: | , which produces label "Works"; or by |
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| Children: | none |
| Mother: | Hosokawa Sumi |
| Father: | Kizaki Ichibei |
(born ; November 22, 1843 – April 10, 1886), later known as the nun, was a Japanese woman from the late Edo period to the Meiji period.[1] [2] She was formerly a geisha under the stage name 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.[3]