During good conditions on the medium wave I could receive Naha Radio – JNB with a NAVTEX message on 518 kHz. The transmitter is located in Itoman, Okinawa (Ryukyu Islands) in the south of Japan. The distance between the transmitter and my home is 9900 Km! My home-made QSL was completely filled in and sent back to Belgium! The address is: Naha Sea Patrol Radio – JNB, Japan Maritime Safety Agency, 11e Regional Coast Guard Headquarters, 2-11-1 Minatomachi, Naha-shi, Okinawa 900 -8547, JAPAN.