Ogasawara Sadayoshi
- Born: 1546
- Died: 1595
- Sons: Ogasawara Hidemasa, Ogasawara Sadayori
- Titles: Ukon daiyu
- Distinction: Uesugi, Tokugawa, Toyotomi retainer
Sadayoshi was a son of Ogasawara Nagatoki. Originally a retainer of Uesugi Kenshin, he left the Uesugi's service and joined Tokugawa Ieyasu. Following the Komaki Campaign (1584) he defected to Toyotomi Hideyoshi.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005