JNR Class B20

Japanese steam locomotive class

Class B20

B20 10

Type and origin
Power type	Steam
Builder	Tateyama Heavy Industries
Build date	1944-1947
Total produced	15

Specifications
Configuration:
• Whyte	0-4-0T
Gauge	1,067 mm
Driver dia.	860 mm
Length	7,000 mm
Loco weight	20.3 t

Performance figures
Maximum speed	45 km/h
Tractive effort	3,190 kg

Career
Retired	1972
Disposition	Two preserved, remainder scrapped

The Class B20 is a type of 0-4-0T steam locomotive built for the Japanese Government Railways during the period 1944–47. They were built by Tateyama Heavy Industries who manufactured a total of fifteen Class B20 locomotives.

Preserved examples

B20 1 - Iwamizawa, Hokkaidō
B20 10 - At Umekoji Steam Locomotive Museum in Kyoto.

Four-driver	10 60 230 400・500・600・700 860 950 960 1000 II 1060 II 1070・1150 5050 B10 B20
Six-driver	1000 I・1010 1020 1170 1200 1230 1250 1265 1360 2100・2120・2700 II・2900・3500 3300 3360 3380 3400 3700 3800 3800 II C10 C11 C12
Ten-driver	4100 4110 E10

Four-driver	5050 1060 5060 5200 5300・5400・5450・5480 5500・5630・5650 5900 5950 6050 6100 6120 6200・6250 6700・6750 6760 B50
Six-driver	8250 8350 8360・8380 8400 8450 8500　I 8500 II・8550 8620 8700 8800 8850 8600/8900 C50 18900/C51 8200 II/C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 (proposed) HC51 (proposed)
Eight-driver	9550・9580 9600 9900/D50 D51 D52 D60 D61 D62 HD53 (proposed) HD60 (proposed)
Ten-driver	KE50 (proposed)
Mallet	9020 9750・9800・9850

Narrow gauge

Four-driver	Ke 100 Ke 110
Six-driver	Ke 150 Ke 160 Ke 170 Ke 200 Ke 210

v t e Japanese railway locomotives
Steam locomotives	150 160 500 860 2120 3080 3150 3380 3800 3900 4100 4110 5100 5500 5700 6200 6700 7010 7100 7170 8150 8620 8700 8900 9550 9600 B20 C10 C11 C12 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 D50 D51 D52 D60 D61 D62 E10
Diesel locomotives	DB10 DB500 DC10 DC11 DD10 DD11 DD12 DD13 DD14 DD15 DD16 DD17 DD18 DD19 DD20 DD21 DD50 DD51 DD53 DD54 DD200 DE10 DE11 DE15 DE50 DF50 DF200 HD300 KiYa 143 KiYa 291 Seibu D15 Seibu D21 Ooikawa DB1 Ooikawa DB51 Ooikawa DD100 Ooikawa DD20
Electric locomotives	EB10 ED10 ED15 ED16 ED17 ED18 ED19 ED60 ED61 ED62 ED70 ED71 ED72 ED73 ED74 ED75 ED76 ED77 ED78 ED79 EF10 EF13 EF15 EF16 EF30 EF50 EF51 EF52 EF53 EF55 EF56 EF57 EF58 EF59 EF60 EF61 EF62 EF63 EF64 EF65 EF66 EF67 EF70 EF71 EF80 EF81 EH10 EH50 ED500 EF200 EF210 EF500 EF510 EH200 EH500 EH800 Chichibu DeKi 1 Chichibu DeKi 100 Chichibu DeKi 200 Chichibu DeKi 300 Chichibu DeKi 500 Meitetsu DeKi 300 Meitetsu DeKi 400 Meitetsu DeKi 600 Meitetsu Class EL120 Tobu ED4010 Tobu ED5000 Tobu ED5010 Tobu ED5060 Seibu E31 Seibu E851 Ooikawa E10 Ooikawa ED90 Toei E5000