Moushitsugi and Soja are used in the same meaning ("Nippo jisho" [Japanese-Portuguese dictionary] defines Shoja, Moushitusgi and Toritsugite [a person in charge of informing a shogun or daimyo of the name of visitors to the residence before a meeting] as synonyms).
申次と奏者は混用が見られる（『日葡辞書』では「奏者」・「申次」・「取次手」を同義語としている）。