The names Sakaisuji-Kaisokukyuko and Sakaisuji-Kyuko were used for the sake of convenience, and on the rollsign the trains' denominations were indicated as 'Kaisokukyuko' (rapid express) and 'Kyuko' (express), respectively.
上記の堺筋快速急行および堺筋急行は便宜上の呼び方であり、表示幕は「快速急行」「急行」と表示される。