yt-dlp-rajiko is an improved radiko.jp extractor plugin for yt-dlp.
Please see the website for more information, including installation and usage instructions.
If the website is down, an archived copy may be available on the Internet Archive's Wayback Machine.
More information about yt-dlp plugins is available from yt-dlp's documentation.
サイトが無くなった場合、おそらくInternet ArchiveのWayback Machineにアーカイブされていました。