Early this morning around 0300hrs local I found the NDB band wide open, so decided to venture lower and found the following:
1733z 40.0KHz JJY Time Signal, Mount Ohtakadoya, Fukushima, Japan 50Kw transmitter, 319 report for 7,900kms
1710z 60.0KHz JJY Time Signal, Mount Hagane, Saga, Japan 50Kw transmitter, 519 report for 7,725kms
1744z 68.5KHz BPC Time Signal, Pucheng, Henan, China 90Kw transmitter, 529 report for 8,296kms.
The above were logged with the new Icom IC R-75 comms receiver which out performed my large Yaesu FT-2000D base via the same antenna, the time signals were barely readable on the big Yaesu.