Although it is mostly read 'Machi-shu' today, it was apparently read 'Cho-shu' according to the historical materials in that period including "Setsuyo-shu" (a book on oriental medicine written by Waichi SUGIYAMA in the 1610s) and "Nippojisho" (Japanese-Portuguese dictionary, published 1603-1604).
今日では「まちしゅう」と読まれることが多いが、『節要集』『日葡辞書』などの同時代史料によれば「ちょうしゅう」と発音されていたようである。