Sakai Tadayo

Sakai Tadayo (酒井 忠世, July 14, 1572 – April 24, 1636) was a Japanese daimyō of the Sengoku period, and high-ranking government advisor, holding the title of Rōjū, and later Tairō.

The son of Sakai Shigetada, Tadayo was born in Nishio, Mikawa Province; his childhood name was Manchiyo.

In 1632, following a shakeup of positions within the bureaucracy, Sakai became nishi no maru rusui, placing him in charge of the western districts of Edo Castle, the seat of the shogunal government.

Appealing to the Gosanke (the heads of the three branch families of the Tokugawa), Sakai was invited to return to the castle two years later, in 1636.

Along with Doi Toshikatsu and Sakai Tadakatsu, he was appointed to the newly created post of Tairō (Great Elder).