On March 25 of the eleventh year of the Meiji Period (1878), the telegraph branch office of Tsukiji was closed and Central Telegraph Office was set up in Kobikicho. The year before, the system of government was reformed and the telegraph dormitory, the competent agency, was renamed the Telegraph Office, and the telegraph office, the operating office, was renamed the telegraph branch office.) The opening was celebrated on the same day. This was the opening of the office itself and at the same time the opening of the country's telegraphy. One of the facilities to introduce the telephone early on was the police agency, which used the telephone when escorting prisoners and issuing urgent orders to search for fugitives, coal and other mining industries, which were the basic industries supporting Japan's industry and defense, also made use of the telephone.

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