Diesel cars manufactured between 1961 and 1977 run through the scenic hilly areas of Bōsō Peninsula, and the line has many antique station buildings.

As of 1 April 2016[update], the railway owns and operates a fleet of 14 KiHa 200 series diesel cars, built by Nippon Sharyo between 1961 and 1977, and numbered 201 to 214.

From 15 November 2015, a Satoyama Torokko (里山トロッコ) open-sided tourist train hauled by a replica steam locomotive powered by a diesel engine entered service on the line, operating generally at weekends only.

In 1942, the line was forced to merge with the Keisei Electric Railway, and remained a subsidiary of that company after the end of World War II.

On 12 April 2006, heavy rains washed away a portion of the tracks between Kazusa-Nakano and Yōrōkeikoku, leading to a two-month disruption in services.