Model 42 type electric trains were introduced at Miyahara Integrated Operation Center when electrification was completed, and local trains were basically made up of two types, Moha 43 (Moha 42) and Kuroha 59.
電化と同時に宮原総合運転所に投入された42系電車は、緩行用としてはモハ43（モハ42）-クロハ59の2連を基本編成とした。