The characteristics of the line during the prewar era was transportation to meet military demand, linking Osaka Artillery Arsenal, Imperial Japanese Army (located in the place of the present-day Osaka Business Park) with the arsenals and magazines located along the line.
戦前の当路線の特色として、大日本帝国陸軍大阪砲兵工廠（現在の大阪ビジネスパークの地にあった）と沿線に設置された工廠や火薬庫を結ぶ軍需輸送がある。