Ōishi Sadahisa
Retainer of the Ogigayatsu-Uesugi branch of the Uesugi, and the builder of Takiyama Castle
About Ōishi Sadahisa
Lived 1491 – 1549 (aged 58). Ōishi Sadahisa was a samurai.
Ōishi Sadahisa (大石 定久; 1 May 1491 – 27 October 1549) was a retainer of the Ogigayatsu-Uesugi branch of the Uesugi, and the builder of Takiyama Castle (滝山城). After the Uesugi were defeated at Kawagoe in 1545, Ōishi accepted the authority of the Hōjō. However, their leader was murdered, and was replaced by Hōjō Ujimasa's second son Hōjō Ujiteru. After the fall of the Hōjō, Ōishi Yoshinaka and Sadakatsu came to work for Okubo Nagayasu.
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Important facts
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Frequently asked questions
Who was Ōishi Sadahisa?
retainer of the Ogigayatsu-Uesugi branch of the Uesugi, and the builder of Takiyama Castle
When was Ōishi Sadahisa born?
Ōishi Sadahisa was born on 1 May 1491.
When did Ōishi Sadahisa die?
Ōishi Sadahisa died on 27 October 1549.
What was Ōishi Sadahisa's occupation?
Ōishi Sadahisa was a samurai.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Ōishi Sadahisa. https://biography.guide/oishi-sadahisa/
MLA: "Ōishi Sadahisa." Biography.guide, https://biography.guide/oishi-sadahisa/.
Chicago: "Ōishi Sadahisa." Biography.guide. https://biography.guide/oishi-sadahisa/.
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