You can listen to foreign language courses in Japanese from anywhere in the world.
You can download mp3 format audio files with free software on your computer.
http://www.takanashi-it-factory.com/archives/1913
You can record on your smartphone, but I don't know the way.
In my case, I buy the textbooks.
https://www.nhk-book.co.jp/pr/text/d_text.html
Shall we enjoy studying together?