- Not to be confused with Ogasawara Sadayoshi (Chizuka) 小笠原貞謙, lord of Chizuka han 1843-1851.
- Born: 1546
- Died: 1595
- Sons: Ogasawara Hidemasa, Ogasawara Sadayori
- Titles: Ukon daiyu
- Distinction: Uesugi, Tokugawa, Toyotomi retainer
- Japanese: 小笠原 貞慶 (Ogasawara Sadayoshi)
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