After broadcasting started in Tokyo, Osaka, and Nagoya, voices rose for broadcasting services to be provided throughout Japan. The pre-war Ministry of Communications announced a guideline to establish a national organization for broadcasting stations. In 1926, Nippon Hoso Kyokai (NHK, Japan Broadcasting Corporation) was established as the national broadcasting organization. The new corporation established four branch offices for Hokkaido, Tohoku, Chugoku, and Kyushu regions. It also accelerated the completion of national relay networks.
In November 1928, a wire relay broadcast network that included seven stations was completed (wireless for Sapporo-Sendai only). This relay network was constructed just in time for the broadcast of the new Emperor's enthronement ceremony.