From January 12th we will no longer be able to broadcast to the United States of America, because of licensing issues.
Only listeners in the USA are affected.
To continue listening to J-Pop Project Radio and J-Idols Project Radio we recommend that you use a Virtual Private Network (VPN). These are very easy to use, and also enable you to access overseas programming (including Japanese MVs), as well as improving your online privacy. There are many good ones around, and they are absolutely legal. There is a good independent report on different options at https://www.techradar.com/vpn/best-vpn.