d51

D51 is a class of steam locomotives that operated in Japan, designated by the Japanese Government Railways (JGR) and later by Japanese National Railways (JNR). It is a 2-8-2 Mikado-type locomotive, with four driving axles and a design optimized for heavy freight and mixed-traffic duties on main lines. The D51 class was developed to handle demanding freight tasks and entered service in 1936.

A total of 1,115 locomotives were built through 1951 by several manufacturers to meet growing needs on Japan’s expanding rail network. The D51 remained in broad service through the wartime and early postwar periods and continued to operate on many lines into the 1960s, long after diesel and electric traction began to replace steam on many routes.

The locomotives were known for their robust construction and versatility, capable of hauling long freight trains and handling varying terrain. They played a significant role in Japan’s rail modernization and industrial growth during the mid-20th century.

Preservation and legacy: A number of D51 units have been preserved in museums, parks, and on heritage railways in Japan. Several examples have been restored to operating condition for special excursion services, ensuring the class remains a prominent symbol of the steam era in Japanese railway history. The D51 is commonly referred to by the nickname “Degoichi” within Japan.