Sakai Tadatsugu

Sakai Tadatsugu
Sakai Tadatsugu
酒井忠次
	portrait of Sakai Tadatsugu
Daimyo of Yoshida
	In office; 1565–1578
Succeeded by	Sakai Ietsugu
Personal details
Born	1527; Mikawa province
Died	December 17, 1596; Kyoto
Spouse	Usui
Relatives	Matsudaira Hirotada father-in-law; Tokugawa Ieyasu nephew-in-law;
Nickname	"Boar Slayer" (inokiri)
Military service
Allegiance	Matsudaira clan; Imagawa clan; Tokugawa clan
Unit	Sakai clan
Commands	Yoshida Castle
Battles/wars	Oda-Imagawa conflict (? - 1560) Siege of Ida castle; Siege of Imahashi castle; Siege of Tawara castle; Siege of Fukutani castle (1556); Siege of Terabe; Siege of Marune; ; Mikawa Ikkō-ikki uprising (1563 - 1564) Battle of Azukizaka (1564); Siege of Yoshida Castle (1564); ; Siege of Kakegawa (1569); Battle of Anegawa (1570); Campaign against Takeda clan (1576-1581) Battle of Mikatagahara; Siege of Yoshida Castle; Battle of Nagashino; ; Journey in Iga (1582); Tenshō-Jingo War (1582) Shinano Province invasion; Battle of Wakamiko; ; Tokugawa-Toyotomi conflict (1584) Battle of Komaki and Nagakute; Siege of Shimojima castle; Siege of Kanie Castle; ;

Sakai Tadatsugu (酒井忠次; 1527 – 17 December 1596) was one of the most favored and most successful military commanders serving Tokugawa Ieyasu in the late Sengoku period.

Serving as the highest-ranking general in the Tokugawa clan along with Ishikawa Kazumasa, Tadatsugu is also regarded as one of the Four Guardians of the Tokugawa (Tokugawa-Shitennō), along with Honda Tadakatsu, Ii Naomasa, and Sakakibara Yasumasa. He is also included in another cultural depiction as one of the Tokugawa 16 divine generals (Tokugawa jūrokushinshō). His official title was Sakai Saemon-no-jo Tadatsugu.

Sakai Tadatsugu was also allegedly involved in the conspiracy that caused the death of Lady Tsukiyama and her son, Matsudaira Nobuyasu.