[2] Initially broadcasting on 625kc, the frequency changed to 800kc on March 7, 1932, later on June 7, 920kc.
[1] Television broadcasts from Mount Yahiko started on December 1, 1958, on VHF channel 2.
[1] To prevent Sporadic E propagation from the Utsukushigahara transmitter in Nagano Prefecture, the station moved to channel 8 on April 1, 1962.
NHK Educational Television (JOQB-TV) started broadcasting on November 1, 1962, on channel 12.
[1] A snowstorm hit the prefecture in January 1963, forcing NHK to build an emergency reporting facility in Sanjo.