The KiHa 122 series (キハ122系) and KiHa 127 series (キハ127系) are diesel multiple unit (DMU) train types operated by West Japan Railway Company (JR-West) on the Kishin Line between Himeji and Kōzuki. A total of 19 cars have been delivered, formed as seven single-car KiHa 122 series units and six two-car KiHa 127 series units. Test-running commenced in late September 2008, with the units entering revenue-earning service from the start of the revised timetable on 14 March 2009.

Exterior

The body design features improved crash resistance, based on the 223 series electric multiple unit design. The cars use environmentally-friendly diesel engines with reduced NOx and particulate emissions. Externally, the units are finished in unpainted metal with thin yellow and red waistline stripes.

Interior

Internally, the cars feature flip-over reversible seating arranged 2+1 abreast. Toilets in both types of train are wheelchair-accessible, and the step between the passenger compartment and station platform has been eliminated.

Formations

The KiHa 122 single-car units and KiHa 127 two-car units are formed as follows.

KiHa 122 series (single-car unit)

The KiHa 122 series uses a diesel engine with a small lithium-ion battery (18 kWh) that is used to power auxiliary machines in the train. (Equipped with toilet)

KiHa 127 series (2-car units)

(KiHa 127-0 is equipped with a toilet.)

Derivatives