There are only very few online radio station broadcasting from Miyagi and without a doubt Iwanuma FM 77.9 is one of the most popular and mainstream radio station of Japan. The radio plays a lots of good music and their playlists are also full of good quality music ranging from age, genre and singers.
Iwanuma FM 77.9 official website address is www.fm779.com
If the Radio is extremely choppy and stops every 5 seconds, try listen to this Radio at different time.
Not all Radio Stations function for 24 hours everyday. If you can't listen to any Radio, try to listen at different time, as the Radio Station may stop during midnight according to its own country time zone.