Horio Tadauji
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Horio Tadauji (堀尾 忠氏; 1578 – August 8, 1604) was a tozama daimyō in the Azuchi–Momoyama and Edo period. His father was Horio Yoshiharu.[1] He was the second leader of the Matsue clan.

In 1600 at the Battle of Sekigahara, acting as a substitute for Yoshiharu who had been injured in the run up to the battle, Tadauji took part in Tokugawa Ieyasu's force.[2] After the battle, Ieyasu praised Tadauji for his credit and added his domain to 240,000 koku at Izumo Province.
In 1604, Tadauji died young from a disease before his father Horio Yoshiharu. Tadauji's son, Horio Tadaharu succeeded him as the head of the house. Tadaharu was so young (9 years old), that later Yoshiharu ruled as a godfather until his own death in 1611.