 Nomura akaberekwa semwanakomana wechipiri we ashigaru samurai wepamusoro-soro muHagi, Chōshū Domain, pari zvino Yamaguchi Prefecture. Paaive mudiki, akadzidza paYoshida Shōins Shokansonjuku academy, kwaakajoinha Sonnō jōi kufamba kunopesana neTokugawa shogunate uye kuwanda kwevatorwa muJapan. Akatora chikamu mukuedza kusingabudirire kuuraya rōjū Manabe Akikatsu uye mukupisa kweBritish legation muEdo muna 1862. Akarwa senhengo yemauto eChoshu achirwisa Tokugawa panguva yeChipiri Choshu Expedition. 