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"1厘銅貨". Buntetsu.net (باليابانية). Archived from the original on 2023-11-03. Retrieved 2016-12-10.
"小額通貨の整理及び支払金の端数計算に関する法律" [A law of the abolition of currencies in a small denomination and rounding off a fraction, July 15, 1953 Law No.60]. Shūgiin. مؤرشف من الأصل في 2002-06-28. اطلع عليه بتاريخ 2016-12-05.