KiHa 122 series

The KiHa 122 series (キハ122系, Kiha-122-kei) and KiHa 127 series (キハ127系, Kiha-127-kei) 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.^[2] Test-running commenced in late September 2008,^[4] with the units entering revenue-earning service from the start of the revised timetable on 14 March 2009.^[5]

KiHa 122/127 series
KiHa 127 series 2-car DMU near Oichi Station in September 2019
Manufacturer	Niigata Transys[1]
Constructed	2008–2009
Entered service	2009
Number built	19 vehicles 7 × KiHa 122 6 × KiHa 127
Number in service	19 vehicles
Formation	KiHa 122: Single car unit KiHa 127: 2 cars per unit
Capacity	KiHa 122: 113 (33 seated) KiHa 127: 268 (92 seated)
Operators	JR-West
Depots	Himeji
Lines served	K Kishin Line
Specifications
Car body construction	Stainless steel
Car length	KiHa 122: 20,440 mm (67 ft 1 in) KiHa 127: 20,270 mm (66 ft 6 in)
Width	2,900 mm (9 ft 6 in)
Height	4,040 mm (13 ft 3 in)
Doors	Two pairs per side
Maximum speed	100 km/h (62 mph)[2]
Prime mover(s)	SA6D140HE-2[3]
Power output	Per engine: 331 kW (444 hp) at 2,100 rpm[3]
Transmission	Hydraulic
HVAC	WAU707 ×2
Bogies	WDT65 (driving), WTR248 (trailing)
Braking system(s)	Engine brake, electronically controlled pneumatic brakes
Safety system(s)	ATS-SW
Track gauge	1,067 mm (3 ft 6 in)

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.^[6]

Externally, the units are finished in unpainted metal with thin yellow and red waistline stripes.^[4]

• 
  WTR248 trailer bogie

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.^[6]

• 
  KiHa 127 interior
• 
  KiHa 127 forward view showing LED fare board for wanman driver-only operation
• 
  KiHa 127 toilet

Formations

The KiHa 122 single-car units and KiHa 127 two-car units are formed as follows.^[7]

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.^[8]

KiHa 122 series single-car unit at Harima-Shingu Station in April 2009

Designation	cMc
Numbering	KiHa 122-0
Weight (t)	40.5
Capacity Total/seated	113/33

(Equipped with toilet)

KiHa 127 series (2-car units)

Designation	Mc1	Mc2
Numbering	KiHa 127-0	KiHa 127-1000
Weight (t)	38.5	37.5
Capacity Total/seated	130/41	138/51

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

Derivatives

• ET122, single-car DMUs for use on the third-sector Echigo Tokimeki Railway Nihonkai Hisui Line since March 2015