https://idolmaster-official.jp/news/01_16457

Anzu and Riamu's NHK Radio date has been set as 9/14 14:05 - 14:55 JST.

https://www.nhk.jp/p/rs/7NQKYM25YX/

There is a timeshift as long as you're in Japan.

https://idolmaster-official.jp/news/01_16326

Anzu and Riamu will be on a NHK Radio show this autumn, this will turn out well. They're accepting messages and song requests until the end of the month.
https://forms.nhk.jp/jfe/form/SV_5sFRENQiKYuIVpk

https://www.nhk.jp/p/rs/7NQKYM25YX/