 For a single-tracked line service levels are quite high, except along the prefectural border between Itano and Hiketa.In Tokushima there are through trains to/from the Naruto and Mugi lines, with one train per day running from Takamatsu to via .Since the completion of electrification work between Takamatsu and Iyoshi on the Yosan Line, the Kōtoku Line has received some of the newest DMUs on the JR Shikoku network.