JNR Class E10

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Class E10
Preserved E10 2 at Ōme Railway Park, May 2006
Type and origin
Power type Steam
Designer Atsuo Kinugasa, Eiichi Watabayashi
Builder Kisha Seizo Kaisha company Osaka factory
Serial number 2445 - 2449
Build date 1948
Total produced 5
Configuration 2-10-4
UIC class 1'E2'
Leading dia. 860 mm
Driver dia. 1,250 mm
Trailing dia. 860 mm
Length 14,450 mm
Height 3,982 mm
Axle load 14.24 t
Adhesive weight 70.47 t
Loco weight 102.1 t
Boiler pressure 16.0 kg/cm²
Cylinders 2
Cylinder size 550 mm bore × 660 mm stroke

The Class E10 (E10形?) is a type of 2-10-4 steam locomotive built by the Japanese Government Railways (JGR).

Following the end of World War II Japanese Government Railways was prohibited by GHQ from building new locomotives due to financial difficulties. However, an exception was granted for the E10s to replace the ageing JNR Class 4110 locomotives. This was because it was not possible to substitute existing locomotives on the steep gradients of the Ōu Main Line where the 4110s were used.

The boiler of the E10 was a special design based on the JNR Class D52 with the fire grate area reduced by 0.55m2.[1]

Five locomotives were manufactured at the Kisha Seizo Kaisha (汽車製造会社?) Osaka factory in 1948. They were the last steam locomotives built for Japanese National Railways.[2]

The last examples in regular service were withdrawn in 1962.

Preserved examples[edit]

One E10 remains in preservation: E10 2 at Ome Railway Park in Ōme, Tokyo.[3]

See also[edit]


  • Steam Loco in Japan (Jokei Kikansha style book). Kigei Publishing Company. 1963. 
  • RM Pocket 6: 日本の蒸気機関車 [RM Pocket 6: Steam locomotives of Japan]. Neko Publishing Company. 1994. 
  1. ^ Steam locomotives of Japan p.278-279
  2. ^ Steam locomotives of Japan p.278
  3. ^ Steam locomotives of Japan p.175