Telephone (FY 1928-1937) : Statistical Yearbook of Imperial Japan 58 (1939) Table 197

PERIOD: Japan proper, FY 1928 to FY 1937, Korea, Taiwan, South Sakhalin and Kwantung Province, FY 1932 to FY 1937. SOURCE: [Survey by the Ministry of Communications]; [Statistical Abstract of Communication]; [Statistics by government offices, overseas territories of Japan] .

时期：本州日本，1928财年至1937财年，朝鲜、台湾、南萨哈林岛及关东省，1932财年至1937财年。数据来源：[通信省的调查数据]；[通信统计摘要]；[政府部门、日本海外属地统计资料]。