井伊直政
Ii Naomasa was one of Tokugawa Ieyasu's most trusted Four Generals, and was made "daimyō" of Hikone Domain, with revenues of 180,000 "koku". After his death in 1603, he was succeeded by his son, Ii Naotsugu, who was in poor health. Naotsugu sent his younger brother, Ii Naokatsu to the Siege of Osaka, where he served with great distinction. As a reward, Tokugawa Ieyasu gave Hikone to Naokatsu, and reassigned his elder brother to the much smaller holding (30,000 "koku") of Annaka in 1615. This marked the start of Annaka Domain. After beginning work on Annaka Castle and the surrounding castle town, Naotsugu retired in favor of his son, Ii Naoyoshi, who was transferred to Nishio Domain in Mikawa Province in 1643.