The Jōhoku Line is a Japanese commuter rail line between Kachigawa Station in Kasugai and Biwajima Station in Kiyosu in Aichi Prefecture. Trains are operated by Tokai Transport Service Company, or TKJ in short, while its rail facilities belong to Central Japan Railway Company. TKJ, a wholly owned subsidiary of JR Central, operates this line. Since the electrification of Taketoyo Line, it is the only railway line in Aichi Prefecture to not be electrified.

Kachigawa Station is the name for two different railway stations in the city of Kasugai, Aichi Prefecture, Japan. One is operated by Central Japan Railway Company and the other by the Tōkai Transport Service Company (TKJ).