As his older brother Tadayo and his son, i.e. Tadataka's nephew Tadachika OKUBO was appointed to the lord of Odawara-jo Castle in Sagami Province, Tadataka was provided with the enfeoffment of 3000 koku.
兄・忠世およびその子で甥大久保忠隣が相模国小田原城主に任じられると3000石を与えられる。