During the first half of 1990's, Route 61A that turns back on the way to Bizen (right near Kusauchi) and Route 61B that runs from Shin-Tanabe to Kusauchi via Higashi-Tanabe, were newly established.
1990年代前半頃に草内を目前とした美禅（びぜん）折返しの61A系統と東田辺経由で新田辺～草内を結ぶ路線の61B系統も新設された。