Since its opening in 2017, the Aonami Line is used as the main rapid transit access to Legoland Japan Resort and SCMaglev and Railway Park, both located nearby the terminus.

The line's name is a combination of the company's color ao ("blue"), na for Nagoya, and mi for Minato ward.

[2] Despite serving attractions such as the Nagoya International Exhibition Hall and Nagoya Racecourse (moved to Yatomi in 2022), passenger ridership figures fell short of targets, and in July 2010, the operating company declared debts of approximately 46 billion yen, applying for alternative dispute resolution (ADR) to avoid bankruptcy.

[2] A special "SL Aonami-go" steam train service operated on the Aonami Line on 16 and 17 February 2013, using JNR Class C56 locomotive number 160 as well as three 12 series passenger coaches.

[citation needed] On 27 March 2017, a special Legoland-themed train started operating on the line to commemorate the opening of Legoland Japan, located near Kinjō-futō Station.