Banana FM 87.7 broadcasts from Wakayama, Japan.
Known as the "kingdom of fruit", Wakayama Prefecture is famous for their mandarin oranges as well as strawberries, grapes, persimmons and apricots. Banana cultivation for clothing and household use in Japan dates back to at least the 13th century. The fiber from the shoots are boiled in lye to make yarn, tablecloths and kimonos.
Another banana radio bumper sticker can be seen here.