In a timetable revision made in March of 1997 (mentioned below), Rapid Service was temporarily integrated as a regional rapid train, but in a revision made on March 15, 2008, the regional rapid running to and from JR Nanba once again became a rapid train due to many passengers mistakenly getting on the regional rapid train stopping at Imamiya that runs through the Osaka Loop Line, as well as to make a distinction between regional rapid trains running to and from JR Nanba through Imamiya.
1997年3月のダイヤ改正（後述）で一旦は区間快速に統合されていたが、今宮に停車する大阪環状線直通の区間快速への誤乗等が相次いだことや今宮を通過するJR難波発着の区間快速との区別を図る目的で、2008年3月15日のダイヤ改正でJR難波発着の区間快速を再び快速とした。