During the era of diesel trains, some trains would run through to the Shigaraki Line of the Shigaraki Kogen Railway, and special through-trains were frequently operated after being transferred to JR, but no through-train has been operated since the train crash of the Shigaraki Kogen Railway in 1991.
また、気動車列車の時代には信楽高原鐵道信楽線への直通もあり、JR化後もしばしば臨時の直通列車があったが、1991年の信楽高原鐵道列車衝突事故後、直通列車は運転されていない。