This report explains the structure of the records formerly stored at KDDI which were donated by the KDDI
Corporation to the National Archives of Japan in 2014 by analyzing the Creation and Acquisition Department,
and their year, contents, and area. Records formerly stored at KDDI refer to those regarding international
telecommunications from the 1920s to 1940s created or acquired mainly by the Foreign Affairs Section of the
Ministry of Communications. The contents include records relating to international telegraph, telephone and
submarine cable communications, and wireless telecommunications, and other international telecommunication
business as well as records relating to treaties, laws, and records relating to private corporations such as
International Telecommunications Co. Ltd. The main regions involved were China, the United States, and
Europe. The official records relating to international telecommunications, aside from the records formerly
stored at KDDI, can be confirmed to be a portion of the records of the Ministry of Communications and the
Ministry of Post and Telecommunications and Postal Museum Japan. However, they all have their own unique
characteristics and complement each other.
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