Honda Tadamasa was the eldest son of [[Honda Tadakatsu]]. He accompanied [[Tokugawa Hidetada]] during the [[Sekigahara Campaign]] ([[1600]]) and fought in the [[Osaka Campaign|Osaka castle]] sieges ([[1614]], [[1615]]). In [[1617]] he was reassigned from [[Ise Kuwana han]] to the 250,000-''[[koku]]'' domain of [[Himeji han]] in [[Harima province]]. He was married to a daughter of the late [[Tokugawa Nobuyasu]], Ieyasu's eldest son.
+
Honda Tadamasa was the eldest son of [[Honda Tadakatsu]]. He accompanied [[Tokugawa Hidetada]] during the [[Sekigahara Campaign]] ([[1600]]) and fought in the [[Osaka Campaign|Osaka castle]] sieges ([[1614]], [[1615]]).
+
+
In [[1617]] he was reassigned from [[Ise Kuwana han]] to the 250,000-''[[koku]]'' domain of [[Himeji han]] in [[Harima province]], and expanded [[Himeji castle|the castle]] considerably, including adding residences for his son [[Honda Tadatoki]] and for Tadatoki's wife [[Sen-hime]] (daughter of Tokugawa Hidetada).
+
+
Tadamasa himself was married to a daughter of the late [[Tokugawa Nobuyasu]], Ieyasu's eldest son.