The JGR Class 5500 was a type of 4-4-0 steam locomotive used for 60 years on Japanese Government Railways.

The cylinders were set in a slightly canted position and were used without replacement for the entire life of the locomotive.

In 1929, ten were converted to tank locomotives and reclassified as Class B10.

One Class 5500 locomotive, 5540, is preserved at the Ome Railway Park.

[1] A Class B10 locomotive, B104, is preserved at the Kominato Railway headquarters.