座布団: zabuton

(archaic) to try to / (archaic) to be about to

景虎: a male given name

窃盗: larceny, theft

当用: current use / 登用: one's position, one's job assignment / 盗用: unauthorized use, plagiarism / 東洋: the Orient, the East

盗用: to use without permission, to plagiarize / 登用: to post (someone) to an office or station

(archaic) 全う: Synonym of 全く (mattaku, “completely”)

全う, 完う: to complete, finish, accomplish, fulfill

真っ当, 全う, 完う: honest, proper, decent, just

杉本: a surname