[2] On 29 August 1997, the line was further extended westward to Taishō and eastward to Kadoma-minami.

[2] Over the course of fiscal 2010, the 16 stations within Osaka City were outfitted with automatic platform gates, similar to those already in use on the Imazatosuji Line.

At Taishō, the first station to be so equipped, the gates started operation on 7 July 2010.

Trains are automatically driven using ATO with a single driver on board to open and close the doors and to manually drive the train in emergency situations or when ATO breaks down or is not available.

All trains are stored at the underground Tsurumi-ryokuchi-kita depot (shared with the Imazatosuji Line) located beneath the northwest gate of the Tsurumi-ryokuchi park, and maintained at the underground Tsurumi workshop located beneath the Tsurumi-ryokuchi sports complex.