Most of the radios of Japan is broadcasting for their own community of people and like them FM 21 is also a community oriented radio. The radio is known for their top of the line radio programs of Japanese music which are from popular artists of Japan and which are backed by talk and other community oriented music.
FM 21 official website address is www.fm21.net
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.