The line was opened in 1924 by the Aichi Electric Railway, electrified at 1,500 V DC, to service the Nagoya Port. The line was double-tracked in 1939, but after being damaged by
Typhoon Vera in 1959, the line was repaired as a single track. Although the line used to handle many freight services, they ceased in 1984. A test line for testing
maglev trains ran alongside the line between 1991 and 2004, but the line was removed after
Linimo opened. At the start of the March 16, 2024, timetable revision, the fleet of
5000 series four-car trains used on the line were replaced with
3100 series,
3150 series, and
9100 series two-car sets. ==Stations==