[2] As of 18 March 2023, the tracks through the northern terminus at Osaka Station and adjoining underground platforms were opened for the Haruka, Kuroshio, Mahoroba and Rakuraku Yamato limited express services as well as ordinary trains on the Osaka Higashi Line.

For JR, trains must use the Osaka Loop Line past Tennoji Station, both creating and being affected by delays on that line, and bypassing JR Namba Station in the Namba district, which is Osaka's major commercial center.

[4] The Umeda portion of this plan was eventually incorporated into Phase II of the Osaka Higashi Line project (extension from Shin-Osaka to the underground platforms of Osaka Station), with provisions in place for eventual construction of the Naniwasuji Line itself.

[5] The issue surrounding Osaka Station for JR was alleviated in fiscal 2022 with the opening of the first section (incorporated into the Osaka Higashi Line project, although construction delays have pushed its opening back four years compared to the rest of Phase II), which terminates at the underground platforms of Osaka Station on a route replacing the aboveground Umeda Freight Line.

[9] In February 2023, track switching work took place between the 11th and the 13th of that month (including the decommissioning of the former Umeda Freight Line).