Doi Toshikatsu

He served the shogunate as advisor to shōgun Tokugawa Hidetada for many years, and played an important role in communicating and overseeing the enforcement of shogunal policy across the country; Doi also helped effect trade and diplomatic relations between Japan and the Thai Kingdom of Ayutthaya.

Six years later, Doi became one of the first to be appointed to the newly created post of Tairō (Great Elder), and was made daimyō (feudal lord) of Koga Domain in Shimōsa Province, with a revenue of 160,000 koku.

[1] On April 7, 1633, he was transferred to Koga, Shimōsa Province, with an increased fief of 162,000 koku.

Shortly after Iemitsu took power, Tokugawa Tadanaga and Kato Tadahiro were stripped of their titles.

The other daimyo immediately submitted the letters to Iemitsu, but Tadahiro and Tadanaga did not, which is said to have led to their removal from the ranks.