Chichibu Railway operates the Chichibu Main Line, spanning 71.7 km from Hanyu Station to Mitsumineguchi Station via Kumagaya, as well as a 3.7 km route from Mukawa Station to Mikajiri Freight Station. The express Series 6000, active in the company since 2005-2006, comprises three 3-car sets purchased from Seibu Railway's New 101 Series. These trains have undergone modifications, including conversion to two-door cars, cross seating, squared headlights and taillights, and the addition of an original design obstacle deflector. When introduced in 2006, all three sets featured a cream design with a light blue stripe. However, in October 2014, Set 6003 adopted a revival color scheme resembling the original appearance of the Series 300 and began operation.
-The train can be motorized to an N scale train and is compatible with TM-08R Motorized Chassis, TT-04R Trailer Conversion Kit, and Tomix 0230 Pantograph.