内外国通常郵便物総数 (自明治35年度至同45年大正元年度) ：日本帝国第三十二統計年鑑 (大正2年) 表224

【対象期間】 自明治35年度至同45年大正元年度【注】 本表は内地及在外国局所にて取扱いたるものなり. 明治37年度以前は在朝鮮局所に於ける事実を包含す. 明治40年度以前は調査法を異にし在外国局所にて取扱いたるものは引受種類の区別なく総数のみなるを以て※印を付して之を合計及配達の欄に掲載す【計数出所】 逓信省ヨリ報告ノ材料

This dataset covers the period from the 35th year of the Meiji era to the 1st year of the Taisho era. [Note] This table includes the data handled at both domestic and foreign branches. Prior to the 37th year of the Meiji era, it encompasses the actual facts at the Korean branch. Up until the 40th year of the Meiji era, the survey methods were different, and for the data handled at foreign branches, the total number was simply listed without distinguishing the types of acceptance, marked with an asterisk (*), and displayed in the total and delivery columns. [Source of Counting] Materials reported from the Ministry of Telegraphs.