NHK Radio 1

 is Japan's oldest radio station operated by the public broadcaster, NHK. Its programming output, which consists of news, current affairs, and information programming is broadly similar to the BBC. NHK Radio 1 is available mainly on AM. The callsign is JOAK in Tokyo. It started broadcasting on March 22, 1925. During World War 2 it often broadcast official announcements.
Frequencies.
Tokyo: 594kHz (Power: 300kW; 2020: 500kW)<br>
Osaka: 666kHz (Power: 100kW; 2020: 500kW)<br>
Sapporo: 567kHz (Power: 100kW)<br>
Fukuoka: 612kHz (Power: 100kW)<br>
Nagoya: 729kHz (Power: 50kW; 2020: 300kW)<br>