Due to restructuring at the NHK network in Japan, the second network has ceased operations as of March 30. I was very blessed to have picked them up many times in the early morning hours here in eastern Washington with their often-very strong signals on 774, 747, 693, and 828 khz. The English lessons and arts programming will be missed by those in Japan and us DXers across the pond... 
NHK Radio 2 had been on the air since 1931.
NHK Radio 2 had been on the air since 1931.