As an improved and expanded version of the type C10, 381 type C11s were manufactured at Kisha-Seizo, Hitachi, Nippon Sharyo, and Kawasaki from 1932 to 1947.
Additionally, 20 trains were manufactured for private railways.
From around the time this locomotive was designed, welding as a construction method was established, replacing riveted assembly, and its weight became lighter than that of the C10 type.
Because of their good performance and the ease of backward operation due to them being tank locomotives (locomotives capable of carrying water and coal in the locomotive body), they were able to be used in a wider range of line sections (specific sections of a railroad line).
They were used all over Japan until 1975.
Currently, 2 of them are in dynamic preservation (refers to locomotives that have been preserved in a ready-to-operate state, and/or are still running today) at Oigawa Railways, 3 at Tobu Railways, and 1 at JR Hokkaido, while 45 of them are in static preservation (refers to locomotives that are preserved in a way that does not allow them to be immediately operated, and/or that are simply on display).
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