Tōshōin

15th-century Japanese noblewoman

Tōshōin or Akamatsu Tōshōin was a Japanese noble who acted as the power behind the throne or de facto daimyo of the Akamatsu clan during the Sengoku period. She was the daughter of Hosokawa Katsumoto, sister of Hosokawa Masamoto, and wife of Akamatsu Masanori. Tōshōin was a de facto Daimyo who supported the Akamatsu clan as a guardian of Akamatsu Yoshimura. She took explicit control of the clan as the leader in 1521, after Yoshimura was assassinated.

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