[citation needed] The line was opened on April 28, 1939 by the Japanese National Railways (JNR) as the Amagi Line, in order to supply military equipment to Tachiarai Airfield.

[citation needed] On April 5, 1985, it was agreed that the line would be transferred to a newly created third sector railway company.

Amagi Railway was thus created and inherited the former JNR line on April 1, 1986.

[1] Heavy rainfall damaged a bridge between Oitai and Matsuzaki in 2006 and buses provided the link between those two station for six months until the bridge was repaired.

[citation needed] This article about a Japanese railway line–related topic is a stub.