Weights and Measures in Japan: Past and Present (1914), pp. 18–19: "The setchū-shaku.. [which] Inō Chūkei.. invented.. a mean between the matashirō-shaku and the kyōho-shaku, and was therefore called the measure of setchū (compromise). The length is the same as that of the present shaku". Central Bureau of Weights and Measures The Department of Agriculture and Commerce in Japan (), Weights and Measures in Japan: Past and Present, hdl:2027/uc1.$c174918
Amano (1979). Amano, Kiyoshi 天野 清 (), „Kyōmasu to Edomasu” 京枡と江戸枡, Keiryōshi kenkyū: journal of the Society of Historical Metrology, Japan (în japoneză), 1 (1): 10–19