Background
Ōkubo Tadanao was the posthumous son of Ōkubo Tadanaga, son and heir of the 7th daimyō of Odawara, Ōkubo Tadazane.
大久保 忠愨
Ōkubo Tadanao was the posthumous son of Ōkubo Tadanaga, son and heir of the 7th daimyō of Odawara, Ōkubo Tadazane.
His courtesy title was Kaga no Kami. During his tenure, he was assigned additional duties in guarding the coastline of Izu Province against the incursions of foreign ships and was held responsible for the security of the American legation at Shimoda, where Townsend Harris negotiated the Treaty of Amity and Commerce in 1858. Although married to a daughter of Shimazu Narinobu of Satsuma Domain, he died without heir in 1859.