JJY
- The Method of Emitting Standard Time and Frequency Signal
- Expected Field Strength Value of LF Standard Time and Frequency Signal
- JJY signal
- Information about Reception Report (PDF)
- Past QSL Cards collection (Japanese version)
Ohtakadoya-yama LF station Ohtakadoya-yama LF station (40 kHz)
Hagane-yama LF station Hagane-yama LF station (60 kHz)
Hagane-yama LF station Hagane-yama LF station (60 kHz)