In March of the following year, 1859, Tadatoku had an audience with Iemochi TOKUGAWA, who was seii taishogun (literally, "great general who subdues the barbarians"), and was changed his name to Shigehisa with granted one character of the Shogun's name.
翌6年2月、征夷大将軍徳川家茂に謁見し、その偏諱を授かって茂久と改名する。