Lifespan: Unknown to 5/13 of Kanbun 6 (1666)
Clan: Sanada → Uda → Takigawa
Father: Sanada Masayuki
Siblings: Nobuyuki, Nobushige (Yukimura), Nobukatsu, Masachika, Muramatsu-dono (wife of Oyamada Shigemasa), Seijuin (wife of Sanada Yukimasa), daughter (wife of Kanbara Shigeharu), Seiyōin (wife of Hoshina Masamitsu), Chōshūin (wife of Uda Yoritsugu → Takigawa Kazuatsu), Seikōin (wife of Tsumaki Shigenao), Oraku
Husband: Uda Yoritsugu → Takigawa Kazuatsu
Chōshūin was a woman who lived during the Azuchi-Momoyama and early Edo periods.
She was born as the fifth daughter of Sanada Masayuki, so she was the younger sister of Sanada Nobuyuki and Sanada Nobushige. Initially, she wed Uda Yoritsugu (Kawachi-no-kami). Yoritsugu was the nephew of Uda Yoritada, a daimyō and the father-in-law of Ishida Mitsunari. Yoritsugu was adopted by Mitsunari’s father, Ishida Masatsugu, and was called Ishida Gyōbu-Shōyu. Owing to the marriage of his daughter to Uda Yoritsugu, her father, Masayuki, was solicited by Ishida Mitsunari and joined the Western Army at the Battle of Sekigahara.
On 9/5 of Keichō 5 (1600), the Western Army was defeated at the Battle of Sekigahara. On 9/17, Yoritsugu took his own life at the base of Ishida Mitsunari at Sawayama Castle. Chōshūin separated from the family and fled. Later, she remarried Takigawa Kazuatsu (Sankurō, a grandson of Takigawa Kazumasu).
After the Siege of Ōsaka, however, in 1632, Takigawa Kazuatsu was subject to penalties by the bakufu including by having the adopted daughter of Sanada Nobushige marry into another family. He was dismissed from his position as a scout and messenger for the bakufu and his fief taken away. Thereafter, they resided as a couple in seclusion near Rokujō in the capital of Kyōto. During this time, they received 500 koku as a donation from the Matsushiro domain of Shinano Province.
In 1642, Chōshūin had her portrait made and inscribed by Reinan of the Tōzen Temple. After the death of her husband, the Chōshū sub-temple was built at the Myōshin Temple in Kyōto to serve as a family temple, founded by her nephew, Sekizen.
Chōshūin died in 1666 and was buried at the Chōshū sub-temple that she had constructed.